An evaluation of potential solar radio emission power threat on GPS and GLONASS performance
- 424 Downloads
The L-band solar radio emission has recently been regarded as a potential threat to stable GPS and GLONASS performance. However, the threat has not been completely investigated or assessed so far. We evaluate in detail the occurrence of GPS/GLONASS signal tracking failures under the direct exposure of wideband solar radio emission. By means of theoretical analysis, we found that the solar radio emission power level of 1,000 sfu (solar flux units) or higher can cause GPS/GLONASS signal tracking failures especially at L2 frequency. In order to prove this evaluation, we investigated GPS/GLONASS signal tracking failures at L1 and L2 frequencies during power solar flares X6.5 (December 6, 2006) and X3.4 (December 13, 2006). Comparing these events with weaker solar flare X17.2 on October 28, 2003, we found that L2 signal tracking failures appeared when the solar radio emission power exceeds 1,000 sfu. Therefore, our theoretical and experimental results confirm the earlier results by other authors.
KeywordsSolar flares Solar radio emission GPS GLONASS performance
Authors express profound gratitude to Prof. G. Ya. Smolkov for his support and interest in this investigation, Dr. V. V. Grechnev for his help in using the 1 and 2 GHz data of the Nobeyama Radio Polarimeters and colleagues from the Nobeyama Radio Observatory, for solar radio emission data on December 13, 2006, as well as the IGS (http://lox.ucsd.edu/cgi-bin/al-lCoords.cgi?) and GEONET (ftp://terras.gsi.go.jp/data/GPS products/) for RINEX data. The work is supported by the Siberian Branch of the Russian Academy of Sciences and the Program of basic research of the Presidium of the Russian Academy of Sciences “Solar activity and physical processes in the Sun-Earth system”. Finally, the authors wish to thank the referees for their valuable suggestions which allowed us to improve the quality of the manuscript.
- Afraimovich EL, Lesyuta OS, Ushakov II, Voeykov SV (2002a) Geomagnetic storms and the occurrence of phase slips in the reception of GPS signals. Ann Geophys 45(1):55–71Google Scholar
- Afraimovich EL, Zherebtsov GA, Smolkov GYa (2002b) Total failure of GPS during a solar flare on December 6, 2006. Rep Earth Sci 417(8):1231–1235Google Scholar
- Carrano CS, Groves KM, Bridgwood CT (2007) Effects of the December 2006 solar radio bursts on the GPS receivers of the AFRL-SCINDA network. In: Doherty PH (ed) Proceedings of the international beacon satellite symposium, June 11–15Google Scholar
- Chen Z, Gao Y, Liu Z (2005) Evaluation of solar radio bursts’ effect on GPS receiver signal tracking within international GPS service network. Radio Sci 40:RS3012. doi: 10.1029/2004RS003066
- ICD-GPS-200c (1993) Interface control document. http://www.navcen.uscg.gov/pubs/gps/icd200/ICD200Cw1234.pdf
- ICD-GLONASS (2002) Interface control document (in Russian). http://www.glonassgsm.ru/upl_instructions/-ICD-2002r.pdf
- Kaplan ED (ed) (1996) Understanding GPS: principles and applications. Artech House, NorwoodGoogle Scholar
- Perov AI, Kharisov VN (ed) (2005) GLONASS. Structure and principles of functioning (in Russian), Edition of Radio-electronics. Moskow Google Scholar