Title :
Improving TTFF by Two-Satellite GNSS Positioning
Author :
Kirkko-jaakkola, Martti ; Parviainen, Jussi ; Collin, Jussi ; Takala, Jarmo
Author_Institution :
Dept. of Comput. Syst., Tampere Univ. of Technol., Tampere, Finland
fDate :
10/1/2012 12:00:00 AM
Abstract :
A way is proposed of improving the time to first fix (TTFF) in Global Navigation Satellite System (GNSS) positioning by combining pseudo-range and Doppler positioning with external altitude information. This way the position of a stationary receiver can be resolved using two satellites only. Test results obtained using authentic satellite data demonstrate that the method is sensitive to Doppler measurement errors but can improve the TTFF significantly if the sky view is constrained as, e.g., in urban canyons.
Keywords :
Doppler measurement; radio receivers; satellite navigation; Doppler measurement error; Doppler positioning; Global Navigation Satellite System; TTFF; altitude information; pseudorange positioning; stationary receiver position; time-to-first-fix; two-satellite GNSS positioning; Equations; Global Navigation Satellite Systems; Global Positioning System; Mathematical model; Receivers; Satellites;
Journal_Title :
Aerospace and Electronic Systems, IEEE Transactions on
DOI :
10.1109/TAES.2012.6324754
