A North America Wide Area Neutral Atmosphere Model for GNSS Applications

Rodrigo F. Leandro, Marcelo C. Santos, and Richard B. Langley

Peer Reviewed

Abstract:	In this paper we are introducing a new neutral atmosphere model, which was designed to provide better predictions for different regions inside a delimited wide area. The goal of this new development is to have a more reliable model for wide area augmentation system users, with some homogeneity in terms of accuracy performance over the area of interest. The approach for creating the new wide area neutral atmosphere model for North America (UNBw.na) is comprehensively described and discussed. All result analyses took into consideration the most recent version of the UNB models, until now, UNB3m. Results for prediction of meteorological parameters show that the new grid-based model can perform better than a latitude (only) based model (such as UNB3m). The analyses showed that UNBw.na is consistently better than UNB3m in several aspects, and the adopted procedure for a meteorological parameter grid calibration has resulted in a reliable model.
Published in:	NAVIGATION: Journal of the Institute of Navigation, Volume 56, Number 1
Pages:	57 - 71
Cite this article:	Leandro, Rodrigo F., Santos, Marcelo C., Langley, Richard B., "A North America Wide Area Neutral Atmosphere Model for GNSS Applications", NAVIGATION: Journal of The Institute of Navigation, Vol. 56, No. 1, Spring 2009, pp. 57-71.
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