Kumar R, Bhowmick S A, Babu K N. 2011. Relative calibration using natural terrestrial targets: A preparation towards Oceansat-2 scatterometer. IEEE Transactions on Geoscience and Remote Sensing, 49(6): 2268-2273.
[2]
Kuo Y H, Schreiner W S, Wang J, et al. 2005. Comparison of GPS radio occultation soundings with radiosondes. Geophys. Res. Lett., 32(5):L0518 1-4.
[3]
Kursinski E R, Hajj G A, Schofield J T, et al. 1997. Observing earth''s atmosphere with radio occultation measurements using the global positioning system. J. Geophys. Res., 102(D19): 23429-23465.
[4]
Lee S R. 2010. Overview of KOMPSAT-5 program, mission, and system.//2010 IEEE International Geoscience and Remote Sensing Symposium. Honolulu, HI: IEEE, 797-800.
[5]
Leitinger R, Titheridge J E, Kirchengast G, et al. 1996. A simple global empirical model for the F layer of the ionosphere. Kleinheubacher Berichte, 39: 679-704.
[6]
Loiselet M, Stricker N, Menard Y. 2000. GRAS-Metop''s GPS-based atmospheric sounder. ESA Bull., 102: 38-44.
[7]
Puviarasan N, Giri R K, Ranalkar M. 2011. Precipitable water vapour monitoring using ground based GPS system. Mausam, 61: 203-212.
[8]
Rieder M J, Kirchengast G. 2001. Error analysis and characterization of atmospheric profiles retrieved from GNSS occultation data. J. Geophys. Res., 106(D23): 31755-31770.
[9]
Scherllin-Pirscher B, Steiner A K, Kirchengast G, et al. 2011. Empirical analysis and modeling of errors of atmospheric profiles from GPS radio occultation. Atmospheric Measurement Techniques, 4(2): 1875-1890.
[10]
Steiner A K, Lackner B C, Ladst？dter F, et al. 2011. GPS radio occultation for climate monitoring and change detection. Radio Science, 46(6): 1-17.
[11]
Syndergaard S. 2000. On the ionosphere calibration in GPS radio occultation measurements. Radio Science, 35(3): 865-883.
[12]
Thies B, Bendix J. 2011. Satellite based remote sensing of weather and climate: recent achievements and future perspectives. Meteorological Applications, 18(3): 262-295.
[13]
Wickert J, Beyerle G, K？nig R, et al. 2005. GPS radio occultation with CHAMP and GRACE: A first look at a new and promising satellite configuration for global atmospheric sounding. Annales Geophysicae, 23(3): 653-658.
[14]
Wickert J, Schmidt T, Beyerle G, et al. 2004. The radio occultation experiment aboard CHAMP: Operational data analysis and validation of vertical atmospheric profiles. J. Meteorol. Soc., 82(1B): 381-395.
[15]
Anthes R A, Rocken C, Kuo Y H, et al. 2000. Applications of COSMIC to meteorology and climate. Terr. Atmos. Ocean. Sci., 11(1): 115-156.
[16]
Bissiri S, Hajj G A. 1993. Higher-order ionospheric effects on the GPS observables and means of modeling them. Manuscripta Geodaetica, 18(2): 280-289.
[17]
Buckreuss S, Werninghaus R, Pitz W. 2009. The German satellite mission TerraSAR-X. Aerospace and Electronic Systems Magazine, IEEE, 24(11): 4-9.
[18]
Gobiet A, Kirchengast G. 2004. Advancements of Global Navigation Satellite System radio occultation retrieval in the upper stratosphere for optimal climate monitoring utility. J. Geophys. Res., 109(D24), doi: 10.1029/2004JD005117.
[19]
Gong X Y, Hu X, Wu X C, et al. 2007. Preliminary analysis of error characteristics in atmospheric inversion of GPS radio occultation. Chinese J. Geophys. (in Chinese), 50(4): 1017-1029.
[20]
Hajj G A, Ao C O, Lijima B A, et al. 2004. CHAMP and SAC-C atmospheric occultation results and intercomparisons. J. Geophys. Res., 109(D6): 1-24.
[21]
Jiang H, Huang C. 2003. Simulation study on the effects of orbit error of low earth orbiter on neutral atmospheric phase delay. Chinese J. Geophys. (in Chinese), 46(2): 167-170.
[22]
Ware R, Exner M, Feng D, et al. 1996. GPS Sounding of the atmosphere from Low Earth Orbit: Preliminary results. Bull. Amer. Meteor. Soc., 77(1): 19-40.
[23]
Zeng Z, Hu X, Zhang X X, et al. 2004. Inversion of ionospheric GPS occultation data. Chinese J. Geophys. (in Chinese), 47(4): 578-583.
[24]
Zhang K, Fu E, Silcock D, et al. 2011. An investigation of atmospheric temperature profiles in the Australian region using collocated GPS radio occultation and radiosonde data. Atmospheric Measurement Techniques, 4(10): 2087-2092.
