DocumentCode :
2462026
Title :
Integer cycle ambiguity resolution under conditions of low satellite visibility
Author :
Sutton, Eric
Author_Institution :
Graduate Eng. & Res. Center, Univ. of Florida, Shalimar, FL, USA
fYear :
2002
fDate :
2002
Firstpage :
91
Lastpage :
98
Abstract :
GPS attitude determination systems use carrier phase measurements at three or more antennas to determine platform orientation. Since the antenna separation is usually more than half of the GPS carrier wavelength, the measurements contain an integer cycle ambiguity that must be resolved before attitude can be calculated. This paper will present a new algorithm to instantaneously and reliably resolve the integer cycle ambiguities under conditions of low satellite visibility using at least four antennas in a non-planar array. The new algorithm makes it possible to establish and maintain an attitude solution with as few as two satellites if clock differences are calibrated or three satellites if they are not. Analysis of antenna array geometry and algorithm performance using simulated data will also be presented.
Keywords :
Global Positioning System; antenna arrays; artificial satellites; attitude measurement; GPS; algorithm performance; antenna array geometry; antenna separation; attitude determination systems; carrier phase measurements; clock differences; integer cycle ambiguity resolution; low satellite visibility; nonplanar array; platform orientation; Antenna arrays; Antenna measurements; Clocks; Global Positioning System; Maintenance; Performance analysis; Phase measurement; Position measurement; Satellite antennas; Wavelength measurement;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Position Location and Navigation Symposium, 2002 IEEE
Print_ISBN :
0-7803-7251-4
Type :
conf
DOI :
10.1109/PLANS.2002.998894
Filename :
998894
Link To Document :
بازگشت