Dependence of GLONASS Pseudorange Inter-frequency Bias on Receiver-Antenna Combination and impact on Precise Point Positioning

GLONASS pseudorange observations are affected by inter -frequency channel biases (ICBs) due to the frequency division multiple access (FDMA) satellite signal structure. This research estimated the GLONASS pseudorange inter-frequency channel biases using 350 IGS stations, based on 32 receiver types and over 11 antenna types over a period of 1 week, DOY 195 to 201 in 2013. An improvement of 19% and 1% was observed after calibrating out the pseudorange ICBs, in the horizontal and vertical components, respectively, considering a 20-min convergence period. Two major contributions are presented. The first contribution is the presentation of the four different scenarios involving varying different receiver and antenna types and how that variability affects the characteristics of ICBs. Attention is also drawn to the characteristics of the Analysis Center (AC) satellite common mean errors. In relation to the antipodal nature of the GLONASS satellites, the correlation of the GLONASS frequency numbers with the AC-satellite common mean errors is addressed. Copyright 2016 Institute of Navigation.