Generation of a consistent absolute phase-center correction model for GPS receiver and satellite antennas

被引:432
作者
Schmid, Ralf
Steigenberger, Peter
Gendt, Gerd
Ge, Maorong
Rothacher, Markus
机构
[1] Tech Univ Munich, Inst Astron & Phys Geodasie, D-80333 Munich, Germany
[2] Tech Univ Munich, Forschungseinrichtung Satellitengeodasie, D-80333 Munich, Germany
[3] GeoForschungsZentrum Potsdam, D-14473 Potsdam, Germany
关键词
GPS; satellite antenna; receiver antenna; absolute phase-center corrections; GPS data reprocessing;
D O I
10.1007/s00190-007-0148-y
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
The development and numerical values of the new absolute phase-center correction model for GPS receiver and satellite antennas, as adopted by the International GNSS (global navigation satellite systems) Service, are presented. Fixing absolute receiver antenna phase-center corrections to robot-based calibrations, the GeoForschungsZentrum Potsdam (GFZ) and the Technische Universitat Munchen reprocessed more than 10 years of GPS data in order to generate a consistent set of nadir-dependent phase-center variations (PCVs) and offsets in the z-direction pointing toward the Earth for all GPS satellites in orbit during that period. The agreement between the two solutions estimated by independent software packages is better than 1 mm for the PCVs and about 4 cm for the z-offsets. In addition, the long time-series facilitates the study of correlations of the satellite antenna corrections with several other parameters such as the global terrestrial scale or the orientation of the orbital planes with respect to the Sun. Finally, completely reprocessed GPS solutions using different phase-center correction models demonstrate the benefits from switching from relative to absolute antenna phase-center corrections. For example, tropospheric zenith delay biases between GPS and very long baseline interferometry (VLBI), as well as the drift of the terrestrial scale, are reduced and the GPS orbit consistency is improved.
引用
收藏
页码:781 / 798
页数:18
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