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Chinese Journal of Space Science ›› 2017, Vol. 37 ›› Issue (6): 724-728.doi: 10.11728/cjss2017.06.724

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Error Source Analysis of Atmospheric Occultation Sounding System

HAN Ying1, FU Yang2, BAI Weihua3, GONG Xiaoyan3   

  1. 1. Department of Mathematics and Physics, Beijing Institute of Petrochemical Technology, Beijing 102617;
    2. Beijing Institute of Applied Meteorology, Beijing 100029;
    3. National Space Science Center, Chinese Academy of Sciences, Beijing 100190
  • Received:2016-12-24 Revised:2017-04-17 Online:2017-11-15 Published:2017-11-10

Abstract:

The error sources that influence the precision of atmospheric retrieval parameters obtained by the atmospheric occultation sounding system are studied. Each error which contributed to the total variance of the product was analyzed in detail, such as the Doppler observation error, the antenna phase center changing error, multipath error, the satellite centroid change error, the GNSS satellite clock drift error, satellite attitude variety error and the velocity error of precise orbit determination. The main errors that must be accounted carefully are the Doppler observation error, the multipath error, the antenna phase center changing error and the satellite attitude variety error. Especially if the distance between the satellite centroid and the occultation receiving antenna phase center is larger than 0.5m, or the satellite attitude variety is larger than 0.01(°) ·s-1, the error will become unacceptable. According to the implementation feasibility, the total error allocation scheme can offer a reference for the system design of atmospheric occultation sounding system.

Key words: Atmospheric occultation sounding, Satellite system, Error analysis

CLC Number: