Planar and three-dimensional precision estimation method of low earth orbit satellite
The invention belongs to the field of photogrammetry and computer simulation, in particular relates to a planar and three-dimensional precision estimation method of a low earth orbit satellite, and discloses a completely novel low earth orbit satellite posture simulation method for solving conventional technical defects, making up the blank of the aspect in China, and providing the analysis basis for advanced researches on low earth orbits. According to the technical scheme of the invention, the low earth orbit satellite imaging process is analyzed, corresponding imaging equations are established on the basis, and the positioning precision is obtained through the comparison of imaging equation results with errors and imaging equation results without errors.
The electronic structure and nature of chemical bonding in orthorhombic Si2N2O with substitution impurities (all 3d-atoms) in the cation sublattice have been investigated by the self-consistent ab initio discrete variation method. Consistent changes in the energy structure, interatomic interaction parameters, effective atomic charges, and local moments of substitution 3d-impurities in the series under study are discussed.