On the Geodetic Feasibility of Mars with VLBI Observables from Mars Probe
Based on the observation of Mars probe with ground VLBI, the observation model including the position of Mars probe and connection parameters of reference systems is studied in this paper, and the estimable parameter sequence is determined. Then the adjustment method appropriate for rank defect in the matrix of normal equation coefficients is studied, the model parameters are calculated and their precisions are evaluated. Thirdly, the impact of accidental errors to the parameters is analyzed. The results are given at the end of the paper.
Simulated Computation of Geodetic Parameters with Space VLBI Observations
The meaning to research the potential of space VLBI for geodetic applications is summarized.The observation types of space VLBI are investigated,and so are the observation models and their related parameters of geodetic interest.With the world wide VLBI data from 1980~2004,the conditions to compute the parameters of geodetic interest are introduced,and so are the computing methods and processes.And the computed results of the parameters of geodetic interest are analyzed.
Formulation for Observed and Computed Values of Deep Space Network Data Types for Navigation
Foreword. Preface. Acknowledgments. Introduction. Time Scales and Time Differences. Planetary Ephemeris, Small-Body Ephemeris, and Satellite Ephemerides. Spacecraft Ephemeris and Partials File. Geocentric Space-Fixed Position, Velocity, and Acceleration Vectors of Tracking Station. Space-Fixed Position, Velocity, and Acceleration Vectors of a Landed Spacecraft Relative to Center of Mass of Planet, Planetary System, or the Moon. Algorithms for Computing ET-TAI. Light-Time Solution. Angles. Media and Antenna Corrections. Calculation of Precision Light Times and Quasar Delays. Partial Derivatives of Precision Light Times and Quasar Delays. Observables. References. Acronyms. Index.