UPC-RapidNetwork: Estimation of Differential Code Biases

The Differential Code Biases (DCBs) of receivers and transmitters are estimated by substracting the individual STEC from the ionospheric combination of pseudoranges (P2-P1 in GPS after correcting the transmitter and receiver phase center deviations), by considering an elevation mask (e.g. 20 deg) to avoid the most part of pseudorange multipath and after applying the DCB datum (the mean value of the transmitter DCBs is taken as zero as reference).