20.10.2020

NAVCAST, GNSS phase and code bias corrections now available

NAVCAST, worldwide Spaceopal’s GNSS correction service for high-accuracy applications, targets the more demanding GNSS users delivering GNSS phase and code bias corrections. 

 

NAVCAST users in more than forty countries are now able to remove the contribution of imperfections in the GNSS satellite hardware. The biases are delays in the generation and transmission of GNSS signals from each satellite. At the user side, biases affect code and phase measurements and most likely impact user’s Precise Point Positioning (PPP) accuracy.

 

Phase biases reduce the user’s algorithm capacity to resolve the integer ambiguities in PPP and dilate the convergence time. The only way to resolve the ambiguities is by externally providing before the ambiguity resolution is attempted.

 

Code bias prevents the use of satellite clock estimations deemed for a different ionosphere free signal combination (e.g. GPS L1 C/A and L2 P(Y) vs GPS L1 C/A and L5 I+Q) to accurately correct the satellite clock offsets.  The way to address this is by externally providing code bias.

 

NAVCAST users have now the possibility or reliably correct for GNSS hardware bias and obtain a more accurate positioning in less time.