<commit_before>export const methodCodes = {
  "direction_estimation": {
    "codes": [{
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#DE-BFL"],
      "code": "DE-BFL",
      "definition": "Best fit line"
    }, {
      "code": "DE-BFL-A",
      "definition": "Best fit line: Linear regression anchored in the origin"
    }, {
      "code": "DE-BFL-O",
      "definition": "Best fit line: Linear regression with origin included but not anchored in calculations"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#DE-BFL"],
      "code": "DE-BFP",
      "definition": "Best fit plane"
    }, {
      "code": "DE-BFP-G",
      "definition": "Best fit plane: Great circle"
    }, {
      "code": "DE-BFP-S",
      "definition": "Best fit plane: Small circle"
    }, {
      "code": "DE-BLANKET",
      "definition": "Direction after a single demag"
    }, {
      "code": "DE-BS",
      "definition": "Bingham statistics"
    }, {
      "IAGA": "Ptype D",
      "code": "DE-DI",
      "definition": "Pole latitude and longitude calculation from mean declination-inclination"
    }, {
      "code": "DE-FM",
      "definition": "Fisher mean"
    }, {
      "code": "DE-FM-LP",
      "definition": "Fisher mean: Line and planes"
    }, {
      "code": "DE-FM-UV",
      "definition": "Fisher mean: Unit vectors"
    }, {
      "code": "DE-K",
      "definition": "Kappa estimation"
    }, {
      "code": "DE-K-F",
      "definition": "Kappa estimation: McFadden's (1980) best estimate of Fisherian Kappa, given by Kf=(N-1)/(N-R), an unbiased estimate for 1/kappa"
    }, {
      "code": "DE-K-ML",
      "definition": "Kappa estimation: Maximum likelihood estimate of Fisherian Kappa, given by Kml=N/(N-R)"
    }, {
      "code": "DE-K-RAT",
      "definition": "Kappa estimation: Ratio of Kappa's from two different distributions"
    }, {
      "code": "DE-K-U",
      "definition": "Kappa estimation: Unbiased estimate of Fisherian Kappa, given by Ku=(N-2)/(N-R)"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#PE-MAD"],
      "code": "DE-MAD",
      "definition": "Maximum angle of deviation"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#PE-MAD"],
      "code": "DE-MAD-L",
      "definition": "Maximum angle of deviation: Estimated about best-fit line"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#PE-MAD"],
      "code": "DE-MAD-P",
      "definition": "Maximum angle of deviation: Estimated about best-fit plane"
    }, {
      "code": "DE-NRM",
      "definition": "NRM used as the direction"
    }, {
      "code": "DE-POLE",
      "definition": "Generic paleomagnetic pole"
    }, {
      "code": "DE-RAN",
      "definition": "Uses R to test for randomness of set of directions"
    }, {
      "code": "DE-V",
      "definition": "Definition of parameter V for different sets of N & R directions"
    }, {
      "IAGA": "Ptype V",
      "code": "DE-VGP",
      "definition": "Pole latitude and longitude calculation from mean VGP"
    }, {
      "code": "DE-VM",
      "definition": "Vector mean, including magnitude of vector, rather than just Fisher mean unit vectors"
    }],
    "label": "Direction Estimation"
  },
  "sample_orientation": {
    "codes": [{
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#SO-CMD"],
      "code": "SO-ASO",
      "definition": "Determining orientation by acoustic scanning in drill holes"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#SO-CMD"],
      "code": "SO-CMD-NORTH",
      "definition": "Correction applied for magnetic declination: True north"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#SO-CMD"],
      "code": "SO-CMD-ZERO",
      "definition": "Correction applied for magnetic declination: Zero"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#SO-CO"],
      "code": "SO-CO",
      "definition": "Plaster (or similar substance) cap-oriented samples"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#SO-CMD"],
      "code": "SO-DML",
      "definition": "Determining orientation by deep matter logging in drill holes"
    }, {
      "code": "SO-GAD",
      "definition": "All samples oriented in an arbitrary direction and then corrected assuming GAD direction of 0 or 180 degrees."
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#SO-GPD"],
      "code": "SO-GPS-DIFF",
      "definition": "Differential GPS"
    }, {
      "code": "SO-GT5",
      "definition": "Sample orientation uncertainty greater than five degrees"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#SO-INCL"],
      "code": "SO-INCL",
      "definition": "Inclinometer"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#SO-MAG"],
      "code": "SO-MAG",
      "definition": "Magnetic compass"
    }, {
      "code": "SO-NO",
      "definition": "Unknown sample orientation method"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#SO-POM"],
      "code": "SO-POM",
      "definition": "Pomeroy orientation device"
    }, {
      "code": "SO-REC",
      "definition": "Calculated from a combination of corrected and uncorrected directional data"
    }, {
      "code": "SO-SIGHT",
      "definition": "Sighting"
    }, {
      "code": "SO-SIGHT-AZ",
      "definition": "Sighting: Azimuth"
    }, {
      "code": "SO-SIGHT-BACK",
      "definition": "Sighting: Backsighting"
    }, {
      "code": "SO-SIGHT-GF",
      "definition": "Sighting: Geographic feature"
    }, {
      "code": "SO-SIGHT-LM",
      "definition": "Sighting: Landmark"
    }, {
      "code": "SO-SM",
      "definition": "Magnetic and/or sun compass"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#SO-SUN"],
      "code": "SO-SUN",
      "definition": "Sun compass"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#SO-SUN"],
      "code": "SO-SUN-SIGHT",
      "definition": "Majority sun compass with some sighting"  
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#SO-CMD"],
      "code": "SO-TENSOR",
      "definition": "Determining orientation by tensor tool"
    }, {
      "code": "SO-V",
      "definition": "Vertical orientation of sample only (in drill core for example)"
    }],
    "label": "Sample Orientation"
  },
  "sample_preparation": {
    "codes": [{
      "code": "SP-ACID",
      "definition": "Acid leaching"
    }, {
      "code": "SP-CRUSH",
      "definition": "Crushing of sample"
    }, {
      "code": "SP-EM",
      "definition": "Samples embedded in matrix"
    }, {
      "code": "SP-HAND",
      "definition": "Hand picking of grain sample"
    }, {
      "code": "SP-HL",
      "definition": "Heavy liquid mineral separation"
    }, {
      "code": "SP-LD",
      "definition": "Lab drill"
    }, {
      "code": "SP-MAGN",
      "definition": "Magnetic (mineral) separation"
    }, {
      "code": "SP-POL",
      "definition": "Polishing of sample surface"
    }, {
      "code": "SP-RM",
      "definition": "Powdering of sample by ring mill with metal inserts"
    }, {
      "code": "SP-RMA",
      "definition": "Powdering of sample by ring mill with agate inserts"
    }, {
      "code": "SP-SAW",
      "definition": "Sawing rocks with diamond blade rock saw"
    }, {
      "code": "SP-SHTBOX",
      "definition": "Powdering of sample by shatterbox"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#SP-SSA"],
      "code": "SP-SS-A",
      "definition": "Sub sampling: Archeological artifact"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#SP-SSC"],
      "code": "SP-SS-C",
      "definition": "Sub sampling: Core"
    }, {
      "code": "SP-SS-U",
      "definition": "Sub sampling: U-Channel"
    }, {
      "code": "SP-SYN",
      "definition": "Making synthetic material"
    }, {
      "code": "SP-SYN-AN",
      "definition": "Making synthetic material: Annealing"
    }, {
      "code": "SP-SYN-DISP",
      "definition": "Making synthetic material: Dispersion of magnetic particles in a certain matrix"
    }, {
      "code": "SP-SYN-GC",
      "definition": "Making synthetic material: Glass ceramic"
    }, {
      "code": "SP-SYN-RED",
      "definition": "Making synthetic material: Reduction"
    }, {
      "code": "SP-SYN-SG",
      "definition": "Making synthetic material: Solution growth"
    }, {
      "code": "SP-SYN-TFS",
      "definition": "Making synthetic material: Thin film sputtering"
    }, {
      "code": "SP-SYN-TFS-A",
      "definition": "Making synthetic material: Thin film sputtering atom by atom"
    }, {
      "code": "SP-SYN-TFS-M",
      "definition": "Making synthetic material: Thin film sputtering by Masking"
    }],
    "label": "Sample Preparation"
  },
  "intensity_estimation": {
    "codes": [{
      "code": "IE-BB0",
      "definition": "Intensity normalized by GAD field at sampling location using 8x10^22 Am2 axial dipole moment"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch10.html#PE-BETA"],
      "code": "IE-BETA",
      "definition": "Standard error of the paleointensity estimated by total least squares (York, 1969) as the slope of the Arai Plot"
    }, {
      "description": "Specimen level paleointensity and uncertainty determined by averaging all combinations of 4 or more adjacent points within unblocking temperature interval; Sample level paleointensity and standard error estimated by bootstrap resampling of specimen data.",
      "code": "IE-BOOT",
      "definition": "Thellier-type intensity and uncertainty estimated by bootstrap resampling of data"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch10.html#PE-DRATS"],
      "code": "IE-DRAT",
      "definition": "pTRM difference ratio (DRAT)"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch10.html#PE-DRATS"],
      "code": "IE-DRATS",
      "definition": "pTRM difference ratio sum (DRATS)"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch10.html#PE-F"],
      "code": "IE-F",
      "definition": "Fraction of NRM component (Coe's F number)"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch10.html#PE-FF"],
      "code": "IE-FVDS",
      "definition": "Fraction of vector difference sum of NRM components"
    }, {
      "code": "IE-MLAT",
      "definition": "Paleo-latitude"
    }, {
      "code": "IE-MLAT-CPP",
      "definition": "Paleo-latitude derived from site age and a contemporaneous pole position or APWP"
    }, {
      "code": "IE-MLAT-PR",
      "definition": "Paleo-latitude derived from site age and plate reconstruction model"
    }, {
      "code": "IE-MR",
      "definition": "Mean of the ratio (TRM/NRM) obtained for different temperature steps"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch10.html#PE-R"],
      "code": "IE-R",
      "definition": "Ratio of total TRM to NRM"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch10.html#PE-SH"],
      "code": "IE-SH",
      "definition": "Best-fit slope through Shaw data"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch10.html#PE-TT"],
      "code": "IE-TT",
      "definition": "Best-fit slope through TT data"
    }, {
      "code": "IE-WIN",
      "definition": "Windowed relative intensities"
    }],
    "label": "Intensity Estimation"
  },
  "field_sampling": {
    "codes": [{
      "code": "FS-AT",
      "definition": "Sampled with adhesive tape"
    }, {
      "code": "FS-C",
      "definition": "Coring"
    }, {
      "code": "FS-C-BARREL",
      "definition": "Coring: Barrel coring"
    }, {
      "code": "FS-C-BARREL-X",
      "definition": "Coring: Extended barrel coring"
    }, {
      "code": "FS-C-BOX",
      "definition": "Coring: Box coring"
    }, {
      "code": "FS-C-DRILL",
      "definition": "Coring: Drilling"
    }, {
      "code": "FS-C-DRILL-DSDP",
      "definition": "Coring: DSDP drilling"
    }, {
      "code": "FS-C-DRILL-IODP",
      "definition": "Coring: IODP drilling"
    }, {
      "code": "FS-C-DRILL-ODP",
      "definition": "Coring: ODP drilling"
    }, {
      "code": "FS-C-FREEZE",
      "definition": "Coring: Freeze coring"
    }, {
      "code": "FS-C-GRAV",
      "definition": "Coring: Gravity coring"
    }, {
      "code": "FS-C-MULTI",
      "definition": "Coring: Multi coring"
    }, {
      "code": "FS-C-PISTON",
      "definition": "Coring: Piston coring"
    }, {
      "code": "FS-C-PISTON-A",
      "definition": "Coring: Advanced piston coring"
    }, {
      "code": "FS-C-PISTON-F",
      "definition": "Coring: Half-length advanced piston coring"
    }, {
      "code": "FS-C-PISTON-H",
      "definition": "Coring: Hydraulic piston coring"
    }, {
      "code": "FS-C-PUSH",
      "definition": "Coring: Push coring"
    }, {
      "code": "FS-C-ROT",
      "definition": "Coring: Rotary coring"
    }, {
      "code": "FS-C-VIBRA",
      "definition": "Coring: Vibra coring"
    }, {
      "code": "FS-C-WAX",
      "definition": "Coring: Wax coring"
    }, {
      "code": "FS-D",
      "definition": "Dredging"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#FS-FD"],
      "code": "FS-FD",
      "definition": "Field drilling using a hand-held portable drill"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#FS-H"],
      "code": "FS-H",
      "definition": "Hand sampling"
    }, {
      "code": "FS-LOC-GIS",
      "definition": "Location determination: Digitization of latitude and longitudes using GIS tools"
    }, {
      "code": "FS-LOC-GOOGLE",
      "definition": "Location determination: Digitization of latitude and longitudes using Google Maps or Earth"
    }, {
      "code": "FS-LOC-GPS",
      "definition": "Location determination: Latitude and longitude by GPS measurement"
    }, {
      "code": "FS-LOC-MAP",
      "definition": "Location determination: Digitization of latitude and longitudes from map"
    }, {
      "code": "FS-LOC-UTM",
      "definition": "Location determination: Latitude and longitude converted from UTM coordinates"
    }, {
      "code": "FS-SS-C",
      "definition": "Subsampling: Cubed subsample of core"
    }, {
      "code": "FS-SYN",
      "definition": "Synthetic material: No field sampling"
    }],
    "label": "Field Sampling"
  },
  "geoid": {
    "codes": [{
        "code": "GE-ALASKA94"
      }, {
        "code": "GE-CARIB97"
      }, {
        "code": "GE-DEFLEC105"
      }, {
        "code": "GE-EGM360"
      }, {
        "code": "GE-G96SSS"
      }, {
        "code": "GE-G99BM"
      }, {
        "code": "GE-G99SSS"
      }, {
        "code": "GE-GEOID03"
      }, {
        "code": "GE-GEOID06"
      }, {
        "code": "GE-GEOID09"
      }, {
        "code": "GE-GEOID12"
      }, {
        "code": "GE-GEOID12A"
      }, {
        "code": "GE-GEOID12B"
      }, {
        "code": "GE-GEOID90"
      }, {
        "code": "GE-GEOID93C"
      }, {
        "code": "GE-GEOID93E"
      }, {
        "code": "GE-GEOID93W"
      }, {
        "code": "GE-GEOID96"
      }, {
        "code": "GE-GEOID99"
      }, {
        "code": "GE-HAW93"
      }, {
        "code": "GE-MEXICO97"
      }, {
        "code": "GE-NAD27"
      }, {
        "code": "GE-NAD83"
      }, {
        "code": "GE-PRVI93"
      }, {
        "code": "GE-USGG2003"
      }, {
        "code": "GE-USGG2009"
      }, {
        "code": "GE-USGG2012"
      }, {
        "code": "GE-WGS84"}
      ],
      "label": "Geoid"
  },
  "lab_protocol": {
    "codes": [{
      "code": "LP-AN",
      "definition": "Anisotropy measurement"
    }, {
      "description": "Measure of anisotropy of anhysteretic susceptibility (AAS) via ARM acquisition (AARM). A fully demagnetized specimen is subject to ARM in three to fifteen (tensor) directions while being demagnetized after each of the ARM steps in the direction of the next ARM.",
      "code": "LP-AN-ARM",
      "definition": "Anisotropy measurement: ARM acquisition"
    }, {
      "code": "LP-AN-IRM",
      "definition": "Anisotropy measurement: IRM acquisition"
    }, {
      "description": "Susceptibility measured in multiple positions to determine susceptibility tensor.",
      "code": "LP-AN-MS",
      "definition": "Anisotropy measurement: Magnetic susceptibility"
    }, {
      "code": "LP-AN-TRM",
      "definition": "Anisotropy measurement: TRM acquisition"
    }, {
      "code": "LP-ARM",
      "definition": "ARM Acquisition"
    }, {
      "code": "LP-ARM-AFD",
      "definition": "ARM Acquisition: AF demagnetization"
    }, {
      "code": "LP-BCR",
      "definition": "Coercivity of remanence"
    }, {
      "description": "Application of progressively larger DC fields to an sIRM to determine the field required to reduce it to zero.",
      "code": "LP-BCR-BF",
      "definition": "Coercivity of remanence: Back field method"
    }, {
      "description": "Field at which ascending loop (after subtraction of Mr) crosses the descending loop.",
      "code": "LP-BCR-CAD",
      "definition": "Coercivity of remanence: Crossing of ascending / descending loops"
    }, {
      "description": "Field at which difference between ascending and descending hysteresis loops is half the magnitude of the zero field crossings.",
      "code": "LP-BCR-HDM",
      "definition": "Coercivity of remanence: Half delta M"
    }, {
      "description": "Variable temperature measurement sequence (e.g. in QD-MPMS) with magnetization measurements while cooling and rewarming.",
      "code": "LP-CW-NRM",
      "definition": "Cycling between cooling and warming: Room temperature NRM"
    }, {
      "description": "Variable temperature measurement sequence (e.g. in QD-MPMS) with magnetization measurements while cooling and rewarming.",
      "code": "LP-CW-SIRM",
      "definition": "Cycling between cooling and warming: Room temperature SIRM"
    }, {
      "IAGA": "DC0",
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch16.html#IAGA7"],
      "code": "LP-DC0",
      "definition": "No demagnetization carried out but only NRM values reported"
    }, {
      "IAGA": "DC1",
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch16.html#IAGA7"],
      "code": "LP-DC1",
      "definition": "Pilot demagnetizations on some samples suggest stability but only NRM values reported"
    }, {
      "IAGA": "DC2",
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch16.html#IAGA7"],
      "code": "LP-DC2",
      "definition": "Bulk demagnetization carried out on all samples but no vector diagrams shown"
    }, {
      "IAGA": "DC3",
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch16.html#IAGA7"],
      "code": "LP-DC3",
      "definition": "Vector diagrams or stereoplots with M/Mo justify demagnetization procedures used"
    }, {
      "IAGA": "DC4",
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch16.html#IAGA7"],
      "code": "LP-DC4",
      "definition": "Principal component analysis carried out from analysis of Zijderveld diagrams"
    }, {
      "IAGA": "DC5",
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch16.html#IAGA7"],
      "code": "LP-DC5",
      "definition": "Magnetic vectors isolated using two or more demagnetization methods with principle component analysis"
    }, {
      "code": "LP-DIR",
      "definition": "Directional data"
    }, {
      "code": "LP-DIR-AF",
      "definition": "Directional data: Step-wise alternating field demagnetization"
    }, {
      "code": "LP-DIR-AF-D",
      "definition": "Directional data: Step-wise alternating field demagnetization, Double"
    }, {
      "code": "LP-DIR-AF-G",
      "definition": "Directional data: Step-wise alternating field demagnetization, Triple"
    }, {
      "code": "LP-DIR-M",
      "definition": "Directional data: Step-wise microwave demagnetization"
    }, {
      "code": "LP-DIR-T",
      "definition": "Directional data: Step-wise thermal demagnetization"
    }, {
      "description": "Measurement of sample NRM on squid or spinner magnetometer, cooling in liquid nitrogen bath, rewarming in zero field and then re-measuring at room temperature.",
      "code": "LP-DM-NRM",
      "definition": "Demagnetization: Room temperature NRM"
    }, {
      "description": "Measurement of sample SIRM on squid or spinner magnetometer, cooling in liquid nitrogen bath, rewarming in zero field and then re-measuring at room temperature.",
      "code": "LP-DM-SIRM",
      "definition": "Demagnetization: Room temperature SIRM"
    }, {
      "code": "LP-FC",
      "definition": "Field cooled: Remanent magnetization measured on warming"
    }, {
      "code": "LP-FC-IM",
      "definition": "Field cooled: Induced magnetization measured on warming"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch7.html#LP-FORC"],
      "code": "LP-FORC",
      "definition": "First order reversal curves or FORC analysis"
    }, {
      "code": "LP-HC",
      "definition": "Half core measurements"
    }, {
      "code": "LP-HYS",
      "definition": "Hysteresis loops"
    }, {
      "urls": ["98056"],
      "code": "LP-HYS-M",
      "definition": "Hysteresis loops: Minor loops"
    }, {
      "code": "LP-HYS-O",
      "definition": "Hysteresis loops: As a function of orientation"
    }, {
      "code": "LP-HYS-T",
      "definition": "Hysteresis loops: As a function of temperature"
    }, {
      "code": "LP-IMAG",
      "definition": "Initial magnetization curves"
    }, {
      "code": "LP-IMT",
      "definition": "Induced magnetization as a function of temperature"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch5.html#LP-IRMAC"],
      "description": "After demagnetization a specimen is subject to successively increasing fields, acquiring partial IRMs until saturation is reached (SIRM). Remanence is measured at each step to provide the IRM acquisition curve.",
      "code": "LP-IRM",
      "definition": "IRM acquisition"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch8.html#LP-IRM3D"],
      "description": "IRM is applied to the specimen along three orthogonal axes at different field strengths (e.g. 5T, 0.4T, 0.12T). Then the specimen is thermally demagnetized and the magnitude along the orthogonal axis (X1,X2,X3) versus temperature is plotted.",
      "code": "LP-IRM-3D",
      "definition": "IRM acquisition: Thermal demagnetization of 3-axis IRM"
    }, {
      "code": "LP-IRM-AFD",
      "definition": "IRM acquisition: AF demagnetization"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch5.html#LP-DCDMAG"],
      "description": "DC field is applied to remove IRM. The specimen is then exposed to increasing strengths of the reverse field until the remanence reduces to zero at Bcr. The IRMs are then plotted versus applied field producing the acquisition/removal curves.",
      "code": "LP-IRM-DCD",
      "definition": "IRM acquisition: DC demagnetization"
    }, {
      "code": "LP-LT",
      "definition": "Lab protocol involving low temperature treatments"
    }, {
      "code": "LP-MC",
      "definition": "Measured while cooling"
    }, {
      "code": "LP-MC-I",
      "definition": "Measured while cooling: In laboratory field"
    }, {
      "code": "LP-MC-Z",
      "definition": "Measured while cooling: In zero field"
    }, {
      "code": "LP-MRM",
      "definition": "MRM acquisition: Microwave induced TRM"
    }, {
      "code": "LP-MRT",
      "definition": "Remanent magnetization as a function of temperature"
    }, {
      "code": "LP-MST",
      "definition": "Saturation magnetization as a function of temperature"
    }, {
      "code": "LP-MW",
      "definition": "Measured while warming"
    }, {
      "code": "LP-MW-I",
      "definition": "Measured while warming: In laboratory field"
    }, {
      "code": "LP-MW-Z",
      "definition": "Measured while warming: In zero field"
    }, {
      "code": "LP-NOMAG",
      "definition": "Magnetization is not defined. No volume or mass given."
    }, {
      "code": "LP-NO",
      "definition": "No demagnetization done. The NRM measurement."
    }, {
      "code": "LP-PFC",
      "definition": "Partial field cooled: Remanent magnetization measured on warming"
    }, {
      "code": "LP-PFC-IM",
      "definition": "Partial field cooled: Induced magnetization measured on warming"
    }, {
      "code": "LP-PI",
      "definition": "Paleointensity experiment",
      "description": "Minimal paleointensity method code, further information, about the basic method, alteration checks, and reciprocity checks can be specified using additional LP-PI codes described below."
    }, {
      "code": "LP-PI-ALT",
      "definition": "Paleointensity experiment: Alteration check",
      "description": "This code is used to indicate that some kind of check was used to detect alteration of the sample during the course of the paleointensity experiments. More details can be specified using the supplemental codes described below."
    }, {
      "code": "LP-PI-ALT-AFARM",
      "definition": "Paleointensity experiment: Alteration check using AF demagnetization of ARM",
      "description": "A method to detect alteration that uses AF demagnetization of an ARM, before and after heating to impart TRM. Changes in the ARM coercivity spectrum indicate alteration.",
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch10.html#IE-S"]
    }, {
      "code": "LP-PI-ALT-AFTRM",
      "definition": "Paleointensity experiment: Alteration check using AF coercivity spectrum before and after TRM acquisition",
      "description": "Check that AF coercivity spectrum does not change during paleointensity experiment."
    }, // {
      //"code": "LP-PI-ALT-DH(Do not use this code)",
      //"definition": "Paleointensity experiment: Alteration check using the double heating method",
      // Comment: Need to change the 5 contributions with this code to LP-PI-ALT-PTRM and then delete this code
    //}, 
    {
      "code": "LP-PI-ALT-PMRM",
      "definition": "Paleointensity experiment: Alteration check using a partial microwave induced TRM check",
      "description": "This is a check for reproducibility of pTRM acquisition at a specific temperature. During a Thellier-type paleointensity experiment, the specimen is reheated to a lower temperature and cooled in the laboratory field, thus reapplying a pTRM."
    }, {
      "code": "LP-PI-ALT-PTRM",
      "definition": "Paleointensity experiment: Alteration check using a pTRM check",
      "description": "This is a check for reproducibility of pTRM acquisition at a specific temperature. During a Thellier-type paleointensity experiment, the specimen is reheated to a lower temperature and cooled in the laboratory field, thus reapplying a pTRM. Coe (1967)",
      "urls": ["https://doi.org/10.1029/JZ072I012P03247"]
    }, {
      "code": "LP-PI-ALT-SUSC",
      "definition": "Paleointensity experiment: Alteration check using specimen susceptibility that does not change after successive heatings"
    }, {  <commit_msg>Added method codes for AF-AF paleointensity method<commit_after>export const methodCodes = {
  "direction_estimation": {
    "codes": [{
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#DE-BFL"],
      "code": "DE-BFL",
      "definition": "Best fit line"
    }, {
      "code": "DE-BFL-A",
      "definition": "Best fit line: Linear regression anchored in the origin"
    }, {
      "code": "DE-BFL-O",
      "definition": "Best fit line: Linear regression with origin included but not anchored in calculations"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#DE-BFL"],
      "code": "DE-BFP",
      "definition": "Best fit plane"
    }, {
      "code": "DE-BFP-G",
      "definition": "Best fit plane: Great circle"
    }, {
      "code": "DE-BFP-S",
      "definition": "Best fit plane: Small circle"
    }, {
      "code": "DE-BLANKET",
      "definition": "Direction after a single demag"
    }, {
      "code": "DE-BS",
      "definition": "Bingham statistics"
    }, {
      "IAGA": "Ptype D",
      "code": "DE-DI",
      "definition": "Pole latitude and longitude calculation from mean declination-inclination"
    }, {
      "code": "DE-FM",
      "definition": "Fisher mean"
    }, {
      "code": "DE-FM-LP",
      "definition": "Fisher mean: Line and planes"
    }, {
      "code": "DE-FM-UV",
      "definition": "Fisher mean: Unit vectors"
    }, {
      "code": "DE-K",
      "definition": "Kappa estimation"
    }, {
      "code": "DE-K-F",
      "definition": "Kappa estimation: McFadden's (1980) best estimate of Fisherian Kappa, given by Kf=(N-1)/(N-R), an unbiased estimate for 1/kappa"
    }, {
      "code": "DE-K-ML",
      "definition": "Kappa estimation: Maximum likelihood estimate of Fisherian Kappa, given by Kml=N/(N-R)"
    }, {
      "code": "DE-K-RAT",
      "definition": "Kappa estimation: Ratio of Kappa's from two different distributions"
    }, {
      "code": "DE-K-U",
      "definition": "Kappa estimation: Unbiased estimate of Fisherian Kappa, given by Ku=(N-2)/(N-R)"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#PE-MAD"],
      "code": "DE-MAD",
      "definition": "Maximum angle of deviation"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#PE-MAD"],
      "code": "DE-MAD-L",
      "definition": "Maximum angle of deviation: Estimated about best-fit line"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#PE-MAD"],
      "code": "DE-MAD-P",
      "definition": "Maximum angle of deviation: Estimated about best-fit plane"
    }, {
      "code": "DE-NRM",
      "definition": "NRM used as the direction"
    }, {
      "code": "DE-POLE",
      "definition": "Generic paleomagnetic pole"
    }, {
      "code": "DE-RAN",
      "definition": "Uses R to test for randomness of set of directions"
    }, {
      "code": "DE-V",
      "definition": "Definition of parameter V for different sets of N & R directions"
    }, {
      "IAGA": "Ptype V",
      "code": "DE-VGP",
      "definition": "Pole latitude and longitude calculation from mean VGP"
    }, {
      "code": "DE-VM",
      "definition": "Vector mean, including magnitude of vector, rather than just Fisher mean unit vectors"
    }],
    "label": "Direction Estimation"
  },
  "sample_orientation": {
    "codes": [{
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#SO-CMD"],
      "code": "SO-ASO",
      "definition": "Determining orientation by acoustic scanning in drill holes"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#SO-CMD"],
      "code": "SO-CMD-NORTH",
      "definition": "Correction applied for magnetic declination: True north"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#SO-CMD"],
      "code": "SO-CMD-ZERO",
      "definition": "Correction applied for magnetic declination: Zero"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#SO-CO"],
      "code": "SO-CO",
      "definition": "Plaster (or similar substance) cap-oriented samples"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#SO-CMD"],
      "code": "SO-DML",
      "definition": "Determining orientation by deep matter logging in drill holes"
    }, {
      "code": "SO-GAD",
      "definition": "All samples oriented in an arbitrary direction and then corrected assuming GAD direction of 0 or 180 degrees."
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#SO-GPD"],
      "code": "SO-GPS-DIFF",
      "definition": "Differential GPS"
    }, {
      "code": "SO-GT5",
      "definition": "Sample orientation uncertainty greater than five degrees"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#SO-INCL"],
      "code": "SO-INCL",
      "definition": "Inclinometer"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#SO-MAG"],
      "code": "SO-MAG",
      "definition": "Magnetic compass"
    }, {
      "code": "SO-NO",
      "definition": "Unknown sample orientation method"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#SO-POM"],
      "code": "SO-POM",
      "definition": "Pomeroy orientation device"
    }, {
      "code": "SO-REC",
      "definition": "Calculated from a combination of corrected and uncorrected directional data"
    }, {
      "code": "SO-SIGHT",
      "definition": "Sighting"
    }, {
      "code": "SO-SIGHT-AZ",
      "definition": "Sighting: Azimuth"
    }, {
      "code": "SO-SIGHT-BACK",
      "definition": "Sighting: Backsighting"
    }, {
      "code": "SO-SIGHT-GF",
      "definition": "Sighting: Geographic feature"
    }, {
      "code": "SO-SIGHT-LM",
      "definition": "Sighting: Landmark"
    }, {
      "code": "SO-SM",
      "definition": "Magnetic and/or sun compass"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#SO-SUN"],
      "code": "SO-SUN",
      "definition": "Sun compass"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#SO-SUN"],
      "code": "SO-SUN-SIGHT",
      "definition": "Majority sun compass with some sighting"  
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#SO-CMD"],
      "code": "SO-TENSOR",
      "definition": "Determining orientation by tensor tool"
    }, {
      "code": "SO-V",
      "definition": "Vertical orientation of sample only (in drill core for example)"
    }],
    "label": "Sample Orientation"
  },
  "sample_preparation": {
    "codes": [{
      "code": "SP-ACID",
      "definition": "Acid leaching"
    }, {
      "code": "SP-CRUSH",
      "definition": "Crushing of sample"
    }, {
      "code": "SP-EM",
      "definition": "Samples embedded in matrix"
    }, {
      "code": "SP-HAND",
      "definition": "Hand picking of grain sample"
    }, {
      "code": "SP-HL",
      "definition": "Heavy liquid mineral separation"
    }, {
      "code": "SP-LD",
      "definition": "Lab drill"
    }, {
      "code": "SP-MAGN",
      "definition": "Magnetic (mineral) separation"
    }, {
      "code": "SP-POL",
      "definition": "Polishing of sample surface"
    }, {
      "code": "SP-RM",
      "definition": "Powdering of sample by ring mill with metal inserts"
    }, {
      "code": "SP-RMA",
      "definition": "Powdering of sample by ring mill with agate inserts"
    }, {
      "code": "SP-SAW",
      "definition": "Sawing rocks with diamond blade rock saw"
    }, {
      "code": "SP-SHTBOX",
      "definition": "Powdering of sample by shatterbox"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#SP-SSA"],
      "code": "SP-SS-A",
      "definition": "Sub sampling: Archeological artifact"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#SP-SSC"],
      "code": "SP-SS-C",
      "definition": "Sub sampling: Core"
    }, {
      "code": "SP-SS-U",
      "definition": "Sub sampling: U-Channel"
    }, {
      "code": "SP-SYN",
      "definition": "Making synthetic material"
    }, {
      "code": "SP-SYN-AN",
      "definition": "Making synthetic material: Annealing"
    }, {
      "code": "SP-SYN-DISP",
      "definition": "Making synthetic material: Dispersion of magnetic particles in a certain matrix"
    }, {
      "code": "SP-SYN-GC",
      "definition": "Making synthetic material: Glass ceramic"
    }, {
      "code": "SP-SYN-RED",
      "definition": "Making synthetic material: Reduction"
    }, {
      "code": "SP-SYN-SG",
      "definition": "Making synthetic material: Solution growth"
    }, {
      "code": "SP-SYN-TFS",
      "definition": "Making synthetic material: Thin film sputtering"
    }, {
      "code": "SP-SYN-TFS-A",
      "definition": "Making synthetic material: Thin film sputtering atom by atom"
    }, {
      "code": "SP-SYN-TFS-M",
      "definition": "Making synthetic material: Thin film sputtering by Masking"
    }],
    "label": "Sample Preparation"
  },
  "intensity_estimation": {
    "codes": [{
      "code": "IE-AFAF",
      "definition": "Best-fit slope through NRM AF demagnetization versus TRM AF demagnetization.",
      "description": "Like the Shaw (1974) method but without the ARM AF demag steps that are used to check for alteration."
    }, {
      "code": "IE-BB0",
      "definition": "Intensity normalized by GAD field at sampling location using 8x10^22 Am2 axial dipole moment"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch10.html#PE-BETA"],
      "code": "IE-BETA",
      "definition": "Standard error of the paleointensity estimated by total least squares (York, 1969) as the slope of the Arai Plot"
    }, {
      "description": "Specimen level paleointensity and uncertainty determined by averaging all combinations of 4 or more adjacent points within unblocking temperature interval; Sample level paleointensity and standard error estimated by bootstrap resampling of specimen data.",
      "code": "IE-BOOT",
      "definition": "Thellier-type intensity and uncertainty estimated by bootstrap resampling of data"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch10.html#PE-DRATS"],
      "code": "IE-DRAT",
      "definition": "pTRM difference ratio (DRAT)"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch10.html#PE-DRATS"],
      "code": "IE-DRATS",
      "definition": "pTRM difference ratio sum (DRATS)"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch10.html#PE-F"],
      "code": "IE-F",
      "definition": "Fraction of NRM component (Coe's F number)"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch10.html#PE-FF"],
      "code": "IE-FVDS",
      "definition": "Fraction of vector difference sum of NRM components"
    }, {
      "code": "IE-MLAT",
      "definition": "Paleo-latitude"
    }, {
      "code": "IE-MLAT-CPP",
      "definition": "Paleo-latitude derived from site age and a contemporaneous pole position or APWP"
    }, {
      "code": "IE-MLAT-PR",
      "definition": "Paleo-latitude derived from site age and plate reconstruction model"
    }, {
      "code": "IE-MR",
      "definition": "Mean of the ratio (TRM/NRM) obtained for different temperature steps"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch10.html#PE-R"],
      "code": "IE-R",
      "definition": "Ratio of total TRM to NRM"
    }, {
      "urls": ["https://doi.org/10.1111/j.1365-246X.1974.tb05443.x","https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch10.html#PE-SH"],
      "code": "IE-SH",
      "definition": "Best-fit slope through Shaw data"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch10.html#PE-TT"],
      "code": "IE-TT",
      "definition": "Best-fit slope through TT data"
    }, {
      "code": "IE-WIN",
      "definition": "Windowed relative intensities"
    }],
    "label": "Intensity Estimation"
  },
  "field_sampling": {
    "codes": [{
      "code": "FS-AT",
      "definition": "Sampled with adhesive tape"
    }, {
      "code": "FS-C",
      "definition": "Coring"
    }, {
      "code": "FS-C-BARREL",
      "definition": "Coring: Barrel coring"
    }, {
      "code": "FS-C-BARREL-X",
      "definition": "Coring: Extended barrel coring"
    }, {
      "code": "FS-C-BOX",
      "definition": "Coring: Box coring"
    }, {
      "code": "FS-C-DRILL",
      "definition": "Coring: Drilling"
    }, {
      "code": "FS-C-DRILL-DSDP",
      "definition": "Coring: DSDP drilling"
    }, {
      "code": "FS-C-DRILL-IODP",
      "definition": "Coring: IODP drilling"
    }, {
      "code": "FS-C-DRILL-ODP",
      "definition": "Coring: ODP drilling"
    }, {
      "code": "FS-C-FREEZE",
      "definition": "Coring: Freeze coring"
    }, {
      "code": "FS-C-GRAV",
      "definition": "Coring: Gravity coring"
    }, {
      "code": "FS-C-MULTI",
      "definition": "Coring: Multi coring"
    }, {
      "code": "FS-C-PISTON",
      "definition": "Coring: Piston coring"
    }, {
      "code": "FS-C-PISTON-A",
      "definition": "Coring: Advanced piston coring"
    }, {
      "code": "FS-C-PISTON-F",
      "definition": "Coring: Half-length advanced piston coring"
    }, {
      "code": "FS-C-PISTON-H",
      "definition": "Coring: Hydraulic piston coring"
    }, {
      "code": "FS-C-PUSH",
      "definition": "Coring: Push coring"
    }, {
      "code": "FS-C-ROT",
      "definition": "Coring: Rotary coring"
    }, {
      "code": "FS-C-VIBRA",
      "definition": "Coring: Vibra coring"
    }, {
      "code": "FS-C-WAX",
      "definition": "Coring: Wax coring"
    }, {
      "code": "FS-D",
      "definition": "Dredging"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#FS-FD"],
      "code": "FS-FD",
      "definition": "Field drilling using a hand-held portable drill"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch9.html#FS-H"],
      "code": "FS-H",
      "definition": "Hand sampling"
    }, {
      "code": "FS-LOC-GIS",
      "definition": "Location determination: Digitization of latitude and longitudes using GIS tools"
    }, {
      "code": "FS-LOC-GOOGLE",
      "definition": "Location determination: Digitization of latitude and longitudes using Google Maps or Earth"
    }, {
      "code": "FS-LOC-GPS",
      "definition": "Location determination: Latitude and longitude by GPS measurement"
    }, {
      "code": "FS-LOC-MAP",
      "definition": "Location determination: Digitization of latitude and longitudes from map"
    }, {
      "code": "FS-LOC-UTM",
      "definition": "Location determination: Latitude and longitude converted from UTM coordinates"
    }, {
      "code": "FS-SS-C",
      "definition": "Subsampling: Cubed subsample of core"
    }, {
      "code": "FS-SYN",
      "definition": "Synthetic material: No field sampling"
    }],
    "label": "Field Sampling"
  },
  "geoid": {
    "codes": [{
        "code": "GE-ALASKA94"
      }, {
        "code": "GE-CARIB97"
      }, {
        "code": "GE-DEFLEC105"
      }, {
        "code": "GE-EGM360"
      }, {
        "code": "GE-G96SSS"
      }, {
        "code": "GE-G99BM"
      }, {
        "code": "GE-G99SSS"
      }, {
        "code": "GE-GEOID03"
      }, {
        "code": "GE-GEOID06"
      }, {
        "code": "GE-GEOID09"
      }, {
        "code": "GE-GEOID12"
      }, {
        "code": "GE-GEOID12A"
      }, {
        "code": "GE-GEOID12B"
      }, {
        "code": "GE-GEOID90"
      }, {
        "code": "GE-GEOID93C"
      }, {
        "code": "GE-GEOID93E"
      }, {
        "code": "GE-GEOID93W"
      }, {
        "code": "GE-GEOID96"
      }, {
        "code": "GE-GEOID99"
      }, {
        "code": "GE-HAW93"
      }, {
        "code": "GE-MEXICO97"
      }, {
        "code": "GE-NAD27"
      }, {
        "code": "GE-NAD83"
      }, {
        "code": "GE-PRVI93"
      }, {
        "code": "GE-USGG2003"
      }, {
        "code": "GE-USGG2009"
      }, {
        "code": "GE-USGG2012"
      }, {
        "code": "GE-WGS84"}
      ],
      "label": "Geoid"
  },
  "lab_protocol": {
    "codes": [{
      "code": "LP-AN",
      "definition": "Anisotropy measurement"
    }, {
      "description": "Measure of anisotropy of anhysteretic susceptibility (AAS) via ARM acquisition (AARM). A fully demagnetized specimen is subject to ARM in three to fifteen (tensor) directions while being demagnetized after each of the ARM steps in the direction of the next ARM.",
      "code": "LP-AN-ARM",
      "definition": "Anisotropy measurement: ARM acquisition"
    }, {
      "code": "LP-AN-IRM",
      "definition": "Anisotropy measurement: IRM acquisition"
    }, {
      "description": "Susceptibility measured in multiple positions to determine susceptibility tensor.",
      "code": "LP-AN-MS",
      "definition": "Anisotropy measurement: Magnetic susceptibility"
    }, {
      "code": "LP-AN-TRM",
      "definition": "Anisotropy measurement: TRM acquisition"
    }, {
      "code": "LP-ARM",
      "definition": "ARM Acquisition"
    }, {
      "code": "LP-ARM-AFD",
      "definition": "ARM Acquisition: AF demagnetization"
    }, {
      "code": "LP-BCR",
      "definition": "Coercivity of remanence"
    }, {
      "description": "Application of progressively larger DC fields to an sIRM to determine the field required to reduce it to zero.",
      "code": "LP-BCR-BF",
      "definition": "Coercivity of remanence: Back field method"
    }, {
      "description": "Field at which ascending loop (after subtraction of Mr) crosses the descending loop.",
      "code": "LP-BCR-CAD",
      "definition": "Coercivity of remanence: Crossing of ascending / descending loops"
    }, {
      "description": "Field at which difference between ascending and descending hysteresis loops is half the magnitude of the zero field crossings.",
      "code": "LP-BCR-HDM",
      "definition": "Coercivity of remanence: Half delta M"
    }, {
      "description": "Variable temperature measurement sequence (e.g. in QD-MPMS) with magnetization measurements while cooling and rewarming.",
      "code": "LP-CW-NRM",
      "definition": "Cycling between cooling and warming: Room temperature NRM"
    }, {
      "description": "Variable temperature measurement sequence (e.g. in QD-MPMS) with magnetization measurements while cooling and rewarming.",
      "code": "LP-CW-SIRM",
      "definition": "Cycling between cooling and warming: Room temperature SIRM"
    }, {
      "IAGA": "DC0",
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch16.html#IAGA7"],
      "code": "LP-DC0",
      "definition": "No demagnetization carried out but only NRM values reported"
    }, {
      "IAGA": "DC1",
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch16.html#IAGA7"],
      "code": "LP-DC1",
      "definition": "Pilot demagnetizations on some samples suggest stability but only NRM values reported"
    }, {
      "IAGA": "DC2",
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch16.html#IAGA7"],
      "code": "LP-DC2",
      "definition": "Bulk demagnetization carried out on all samples but no vector diagrams shown"
    }, {
      "IAGA": "DC3",
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch16.html#IAGA7"],
      "code": "LP-DC3",
      "definition": "Vector diagrams or stereoplots with M/Mo justify demagnetization procedures used"
    }, {
      "IAGA": "DC4",
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch16.html#IAGA7"],
      "code": "LP-DC4",
      "definition": "Principal component analysis carried out from analysis of Zijderveld diagrams"
    }, {
      "IAGA": "DC5",
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch16.html#IAGA7"],
      "code": "LP-DC5",
      "definition": "Magnetic vectors isolated using two or more demagnetization methods with principle component analysis"
    }, {
      "code": "LP-DIR",
      "definition": "Directional data"
    }, {
      "code": "LP-DIR-AF",
      "definition": "Directional data: Step-wise alternating field demagnetization"
    }, {
      "code": "LP-DIR-AF-D",
      "definition": "Directional data: Step-wise alternating field demagnetization, Double"
    }, {
      "code": "LP-DIR-AF-G",
      "definition": "Directional data: Step-wise alternating field demagnetization, Triple"
    }, {
      "code": "LP-DIR-M",
      "definition": "Directional data: Step-wise microwave demagnetization"
    }, {
      "code": "LP-DIR-T",
      "definition": "Directional data: Step-wise thermal demagnetization"
    }, {
      "description": "Measurement of sample NRM on squid or spinner magnetometer, cooling in liquid nitrogen bath, rewarming in zero field and then re-measuring at room temperature.",
      "code": "LP-DM-NRM",
      "definition": "Demagnetization: Room temperature NRM"
    }, {
      "description": "Measurement of sample SIRM on squid or spinner magnetometer, cooling in liquid nitrogen bath, rewarming in zero field and then re-measuring at room temperature.",
      "code": "LP-DM-SIRM",
      "definition": "Demagnetization: Room temperature SIRM"
    }, {
      "code": "LP-FC",
      "definition": "Field cooled: Remanent magnetization measured on warming"
    }, {
      "code": "LP-FC-IM",
      "definition": "Field cooled: Induced magnetization measured on warming"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch7.html#LP-FORC"],
      "code": "LP-FORC",
      "definition": "First order reversal curves or FORC analysis"
    }, {
      "code": "LP-HC",
      "definition": "Half core measurements"
    }, {
      "code": "LP-HYS",
      "definition": "Hysteresis loops"
    }, {
      "urls": ["98056"],
      "code": "LP-HYS-M",
      "definition": "Hysteresis loops: Minor loops"
    }, {
      "code": "LP-HYS-O",
      "definition": "Hysteresis loops: As a function of orientation"
    }, {
      "code": "LP-HYS-T",
      "definition": "Hysteresis loops: As a function of temperature"
    }, {
      "code": "LP-IMAG",
      "definition": "Initial magnetization curves"
    }, {
      "code": "LP-IMT",
      "definition": "Induced magnetization as a function of temperature"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch5.html#LP-IRMAC"],
      "description": "After demagnetization a specimen is subject to successively increasing fields, acquiring partial IRMs until saturation is reached (SIRM). Remanence is measured at each step to provide the IRM acquisition curve.",
      "code": "LP-IRM",
      "definition": "IRM acquisition"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch8.html#LP-IRM3D"],
      "description": "IRM is applied to the specimen along three orthogonal axes at different field strengths (e.g. 5T, 0.4T, 0.12T). Then the specimen is thermally demagnetized and the magnitude along the orthogonal axis (X1,X2,X3) versus temperature is plotted.",
      "code": "LP-IRM-3D",
      "definition": "IRM acquisition: Thermal demagnetization of 3-axis IRM"
    }, {
      "code": "LP-IRM-AFD",
      "definition": "IRM acquisition: AF demagnetization"
    }, {
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch5.html#LP-DCDMAG"],
      "description": "DC field is applied to remove IRM. The specimen is then exposed to increasing strengths of the reverse field until the remanence reduces to zero at Bcr. The IRMs are then plotted versus applied field producing the acquisition/removal curves.",
      "code": "LP-IRM-DCD",
      "definition": "IRM acquisition: DC demagnetization"
    }, {
      "code": "LP-LT",
      "definition": "Lab protocol involving low temperature treatments"
    }, {
      "code": "LP-MC",
      "definition": "Measured while cooling"
    }, {
      "code": "LP-MC-I",
      "definition": "Measured while cooling: In laboratory field"
    }, {
      "code": "LP-MC-Z",
      "definition": "Measured while cooling: In zero field"
    }, {
      "code": "LP-MRM",
      "definition": "MRM acquisition: Microwave induced TRM"
    }, {
      "code": "LP-MRT",
      "definition": "Remanent magnetization as a function of temperature"
    }, {
      "code": "LP-MST",
      "definition": "Saturation magnetization as a function of temperature"
    }, {
      "code": "LP-MW",
      "definition": "Measured while warming"
    }, {
      "code": "LP-MW-I",
      "definition": "Measured while warming: In laboratory field"
    }, {
      "code": "LP-MW-Z",
      "definition": "Measured while warming: In zero field"
    }, {
      "code": "LP-NOMAG",
      "definition": "Magnetization is not defined. No volume or mass given."
    }, {
      "code": "LP-NO",
      "definition": "No demagnetization done. The NRM measurement."
    }, {
      "code": "LP-PFC",
      "definition": "Partial field cooled: Remanent magnetization measured on warming"
    }, {
      "code": "LP-PFC-IM",
      "definition": "Partial field cooled: Induced magnetization measured on warming"
    }, {
      "code": "LP-PI",
      "definition": "Paleointensity experiment",
      "description": "Minimal paleointensity method code, further information, about the basic method, alteration checks, and reciprocity checks can be specified using additional LP-PI codes described below."
    }, {
      "code": "LP-PI-AFAF",
      "definition": "Paleointensity experiment: AF demag of the NRM followed by AF demag of a TRM",
      "description": "This paleointensity method uses the Shaw (1974) method but without the two ARM demagnetiztion procedures that might indicate the rock has been altered by heating."
    }, {
      "code": "LP-PI-ALT",
      "definition": "Paleointensity experiment: Alteration check",
      "description": "This code is used to indicate that some kind of check was used to detect alteration of the sample during the course of the paleointensity experiments. More details can be specified using the supplemental codes described below."
    }, {
      "code": "LP-PI-ALT-AFARM",
      "definition": "Paleointensity experiment: Alteration check using AF demagnetization of ARM",
      "description": "A method to detect alteration that uses AF demagnetization of an ARM, before and after heating to impart TRM. Changes in the ARM coercivity spectrum indicate alteration.",
      "urls": ["https://earthref.org/MagIC/books/Tauxe/Essentials/WebBook3ch10.html#IE-S"]
    }, {
      "code": "LP-PI-ALT-AFTRM",
      "definition": "Paleointensity experiment: Alteration check using AF coercivity spectrum before and after TRM acquisition",
      "description": "Check that AF coercivity spectrum does not change during paleointensity experiment."
    }, // {
      //"code": "LP-PI-ALT-DH(Do not use this code)",
      //"definition": "Paleointensity experiment: Alteration check using the double heating method",
      // Comment: Need to change the 5 contributions with this code to LP-PI-ALT-PTRM and then delete this code
    //}, 
    {
      "code": "LP-PI-ALT-PMRM",
      "definition": "Paleointensity experiment: Alteration check using a partial microwave induced TRM check",
      "description": "This is a check for reproducibility of pTRM acquisition at a specific temperature. During a Thellier-type paleointensity experiment, the specimen is reheated to a lower temperature and cooled in the laboratory field, thus reapplying a pTRM."
    }, {
      "code": "LP-PI-ALT-PTRM",
      "definition": "Paleointensity experiment: Alteration check using a pTRM check",
      "description": "This is a check for reproducibility of pTRM acquisition at a specific temperature. During a Thellier-type paleointensity experiment, the specimen is reheated to a lower temperature and cooled in the laboratory field, thus reapplying a pTRM. Coe (1967)",
      "urls": ["https://doi.org/10.1029/JZ072I012P03247"]
    }, {
      "code": "LP-PI-ALT-SUSC",
      "definition": "Paleointensity experiment: Alteration check using specimen susceptibility that does not change after successive heatings"
    }, {  
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