Comparing Various GPS Neutral Atmospheric Delay Mitigation Strategies: A High Latitude Experiment

R. Ghoddousi-Fard, P. Dare

Abstract:	Numerical Weather Prediction (NWP) models have been used by researchers for neutral atmospheric delay mitigation on GPS measurements. However, in high latitude regions, the performance of both NWP and GPS may be degraded. Lack of enough meteorological sensors in the Arctic may affect initialization of NWP models. The need for using low elevation satellites and hence increasing the associated errors may also be the consequence of the problematic GPS constellation in high latitude regions. During the 2005 Canadian research icebreaker CCGS Amundsen’s mission in the Arctic an experiment was carried out to investigate the performance of the Canadian regional NWP model both in observation and position domains. Wet delay measurements using a Water Vapour Radiometer (WVR), surface pressure measurements from a precise barometer, and data from geodetic quality GPS receivers (including C-Nav) were recorded during most of the sailing. Zenith hydrostatic and non-hydrostatic delays from the NWP model are compared with the WVR and barometer measurements. Long baseline kinematic positioning performance under various neutral atmospheric mitigation strategies such as field measurements, climatic and NWP models are investigated.
Published in:	Proceedings of the 19th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2006) September 26 - 29, 2006 Fort Worth Convention Center Fort Worth, TX
Pages:	1945 - 1953
Cite this article:	Ghoddousi-Fard, R., Dare, P., "Comparing Various GPS Neutral Atmospheric Delay Mitigation Strategies: A High Latitude Experiment," Proceedings of the 19th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2006), Fort Worth, TX, September 2006, pp. 1945-1953.
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