First Look at In-Flight Rosa Performance On-Board Oceansat-2

A. Zin, S. Landenna, L. Marradi, L. Scaciga, S. Zago, E. Mangolini, F. Vespe, V. DeCosmo, G. Perona, R. Notarpietro

Abstract:	OCEANSAT-2 is a mission developed by Indian Space Research Organization (ISRO) for applications dedicated to ocean studies and meteorology [1]. It was launched on Sept 23, 2009 from SHAR, Sriharikota (India) by a PSLV launcher. OCS-2 carries three main payload instruments: an Ocean Colour Monitor (OCM), a Ku-band Scatterometer (SCAT) from ISRO and a GPS Radio Occultation Sounder for Atmospheric studies (ROSA) from the Italian Space Agency (ASI). The focus of this paper is to provide the initial evaluation of the ROSA instrument results and the activities carried out in the initial commissioning phase. In particular the focus will be on instrumental aspects like the analysis of GPS raw data, quantity and quality of signal acquisitions in both navigation and occultation channels, and other instrumental parameter of interest like signal to noise ratio statistics, high-frequency raw sampling (open-loop) functionality. Last but not least an evaluation of the onboard atmospheric model will be provided by comparing the predicted Doppler excess with an estimate of the “truth” signal Doppler when the combined presence of open-loop and closed loop tracking makes it possible. Moreover, initial scientific results like refractivity and electron density profiles are provided and compared with co-located COSMIC events 440 ION 2010
Published in:	Proceedings of the 2010 International Technical Meeting of The Institute of Navigation January 25 - 27, 2010 Catamaran Resort Hotel San Diego, CA
Pages:	440 - 447
Cite this article:	Zin, A., Landenna, S., Marradi, L., Scaciga, L., Zago, S., Mangolini, E., Vespe, F., DeCosmo, V., Perona, G., Notarpietro, R., "First Look at In-Flight Rosa Performance On-Board Oceansat-2," Proceedings of the 2010 International Technical Meeting of The Institute of Navigation, San Diego, CA, January 2010, pp. 440-447.
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