Generation of a consistent absolute phase-center correction model for GPS receiver and satellite antennas
Generation of a consistent absolute phase-center correction model for GPS receiver and satellite antennas
复制标题
DOI：
10.1007/s00190-007-0148-y
复制
发表时间：
2007-12-01
影响因子：
4.4
通讯作者：
Rothacher, Markus
中科院分区：
文献类型：
--
作者：
Schmid, Ralf;Steigenberger, Peter;Rothacher, Markus
介绍了国际全球导航卫星系统（GNSS）服务所采用的GPS接收机和卫星天线的新型绝对相位中心改正模型的发展情况及其数值。波茨坦地学研究中心（GFZ）和慕尼黑工业大学以基于机器人的校准结果固定接收机天线绝对相位中心改正量，对超过10年的GPS数据进行了重新处理，以便为该时段内所有在轨GPS卫星生成一套一致的、与天底角相关的相位中心变化（PCV）以及指向地球的z方向偏移量。由独立软件包估算的两种解之间的一致性，对于PCV优于1毫米，对于z方向偏移量约为4厘米。此外，长时间序列有助于研究卫星天线改正量与其他几个参数的相关性，比如全球陆地尺度或轨道平面相对于太阳的方向。最后，使用不同相位中心改正模型完全重新处理的GPS解表明了从相对天线相位中心改正转换为绝对天线相位中心改正的益处。例如，GPS与甚长基线干涉测量（VLBI）之间的对流层天顶延迟偏差以及陆地尺度的漂移减小了，并且GPS轨道的一致性得到了改善。
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.