GPS radio occultation with GRACE: Atmospheric profiling utilizing the zero difference technique
GPS radio occultation with GRACE: Atmospheric profiling utilizing the zero difference technique
复制标题
DOI：
10.1029/2005gl023109
复制
发表时间：
2004-09
影响因子：
5.2
通讯作者：
G. Beyerle;T. Schmidt;Grzegorz Michalak;S. Heise;J. Wickert;C. Reigber
中科院分区：
文献类型：
--
作者：
G. Beyerle;T. Schmidt;Grzegorz Michalak;S. Heise;J. Wickert;C. Reigber
本文分析了2004年7月28-29日由GRACE - B卫星上的GPS接收机记录的无线电掩星事件。接收机时钟的稳定性允许使用零差分技术推导多余的相位轮廓，使参考GPS卫星同步观测的校准程序过时。本文将101条零差分折射率剖面和96条改进的单差分折射率剖面与同位ECMWF气象分析结果进行了比较。在海拔5 ~ 30 km范围内，结果吻合良好，平均分数折射率偏差小于1%，标准偏差为2 ~ 3%。端到端模拟的结果与这些观测结果一致。
Radio occultation events recorded on 28–29 July 2004 by a GPS receiver aboard the GRACE‐B satellite are analyzed. The stability of the receiver clock allows for the derivation of excess phase profiles using a zero difference technique, rendering the calibration procedure with concurrent observations of a reference GPS satellite obsolete. 101 refractivity profiles obtained by zero differencing and 96 profiles calculated with an improved single difference method are compared with co‐located ECMWF meteorological analyses. Good agreement is found at altitudes between 5 and 30 km with an average fractional refractivity deviation below 1% and a standard deviation of 2–3%. Results from end‐to‐end simulations are consistent with these observations.