Workshop 2018
Bingbing Duan - Phase Biases of GPS L1/L2/L5 for the Purpose of Zero-difference Ambiguity Resolution and Initial Results on Galileo E1/E5a - October 29, 2018 • 67 Views
Rather than fixing double-difference ambiguities based on a network of reference stations, ambiguity resolution of a single receiver requires dedicated satellite orbit, clock, and wide-lane bias products. The IGS (International GNSS Service) CNES/CLS (Centre National d'Etudes Spatiales/ Collecte Localisation Satellites) analysis center provides such GPS products with respect to P1, L1, P2, L2 observations. We estimate GPS wide-lane bias and clock products with respect to C1C, L1C, C2W, L2W observations while fixing the GPS CODE (Center for Orbit Determination in Europe) orbits. Differential code biases of P1-C1 from CODE center are corrected for all the GPS satellites. The estimated GPS wide-lane biases prove to agree fairly well with the CNES products. For particular receivers (user aspect) using the cross-correlation technique that report C2X and L2X rather than C2W and L2W, we prove that the fixing rates of both wide-lane and narrow-lane ambiguities are almost not affected. The resulting products are employed into SENTINEL-3 satellite precise orbit determination for further validation. Compared to float solution, the ambiguity-fixed reduced-dynamic solution reduces the standard deviation of satellite laser ranging residuals from 10.6 mm to 9.1 mm. Moreover, ambiguity fixed kinematic solution marks a notable improvement of more than a factor of two over the float kinematic solution by comparing to the reduced-dynamic solution. The procedure is effective and easy to apply to GPS L1/L5 and Galileo E1/E5a observations. We are going to present some corresponding results as well.

View PDF
 
 
 
 



Please include the IGS logo and citation in all websites, presentations, publications, or posters that use IGS data, products, or services. IGS is a service of IAG.