Third Party On-Board Navigation Software for AGGA-4-Based Space GNSS Receivers: Test Results for GEO Mission

João S. Silva, Hugo D. Lopes, Pedro F. Silva, Carlos Valle, Antonio Latorre, Christian Pommer, Manfred Sust, J.A. Garcia-Molina

Abstract:	GNSS is currently being used in space missions, not only as a navigation sensor but also as a science instrument, in a wide variety of scenarios, including above GNSS orbits, where the processing of GNSS signals is more challenging. The requirements of such a wide range of missions makes flexibility a desired receiver characteristic. The development of the 4th generation of the AGGA (Advanced GPS and Galileo ASIC), a baseband GNSS digital signal processor (developed under ESA contract) targeted for space applications, has recently been completed and the chip is being integrated in the next generation of space GNSS receivers. An example of such receivers is the GAMIR (GPS/Galileo Miniaturized Multi-Frequency Space Receiver), developed by RUAG Space, which will exploit the potential of GPS and Galileo systems for space on-board navigation and for a wide variety of remote sensing applications. In the scope of the A4NAF (AGGA-4 Navigation Framework) project, led by DEIMOS in cooperation with RUAG Space (under ESA funding), a flexible on-board Navigation SW prototype, targeting a variety of missions (including LEO, GTO, GEO/GSO, and HEO), has been developed. Also in the scope of the A4NAF project, to support the development of such and other on-board navigation SW for AGGA-4-based receivers, a (software-based) Software Verification Facility (SVF) was also developed, along with the standardization of an interface to facilitate the integration of 3rd-party SW in the GAMIR receiver. This paper presents the architecture and functionalities of the developed SVF and Navigation SW as well as test results for a GEO scenario obtained using the SVF, which suggest that RMS errors around 2m in position and 1.2cm/s in velocity are achievable for such scenario.
Published in:	Proceedings of the 29th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2016) September 12 - 16, 2016 Oregon Convention Center Portland, Oregon
Pages:	3644 - 3652
Cite this article:	Silva, João S., Lopes, Hugo D., Silva, Pedro F., Valle, Carlos, Latorre, Antonio, Pommer, Christian, Sust, Manfred, Garcia-Molina, J.A., "Third Party On-Board Navigation Software for AGGA-4-Based Space GNSS Receivers: Test Results for GEO Mission," Proceedings of the 29th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2016), Portland, Oregon, September 2016, pp. 3644-3652. https://doi.org/10.33012/2016.14654
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