Articles | Volume 11, issue 2
https://doi.org/10.5194/amt-11-819-2018
https://doi.org/10.5194/amt-11-819-2018
Research article
 | 
13 Feb 2018
Research article |  | 13 Feb 2018

Evaluation of atmospheric profiles derived from single- and zero-difference excess phase processing of BeiDou radio occultation data from the FY-3C GNOS mission

Weihua Bai, Congliang Liu, Xiangguang Meng, Yueqiang Sun, Gottfried Kirchengast, Qifei Du, Xianyi Wang, Guanglin Yang, Mi Liao, Zhongdong Yang, Danyang Zhao, Junming Xia, Yuerong Cai, Lijun Liu, and Dongwei Wang

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Cited articles

Anthes, R. A.: Exploring Earth's atmosphere with radio occultation: contributions to weather, climate and space weather, Atmos. Meas. Tech., 4, 1077–1103, https://doi.org/10.5194/amt-4-1077-2011, 2011. 
Anthes, R. A., Rocken, C., and Kuo, Y.-H.: Applications of COSMIC to meteorology and climate, Terr. Atmos. Ocean. Sci., 11, 115–156, 2000. 
Aparicio, J. and Deblonde, G.: Impact of the assimilation of CHAMP refractivity profiles in Environment Canada global forecasts, Mon. Weather Rev., 136, 257–275, 2008. 
Ashby, N.: Relativity in the Global Positioning System, Living Rev. Relativ., 6, 1, https://doi.org/10.12942/lrr-2003-1, 2003. 
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Short summary
In this study we focus on evaluating zero-difference processing of BDS RO data vs. single-difference processing. From the statistics, average bias (and standard deviation) of the bending angle and refractivity profiles were found to be as small as about 0.05–0.2 % (and 0.7–1.6 %) over the upper troposphere and lower stratosphere, including for the GEO, IGSO, and MEO subsets. Zero differencing was found to perform slightly better, as may be expected from its lower vulnerability to noise.
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