The multi-GNSS and multi-frequency observable-specific signal bias (OSB) products provided by iGMAS Innovation Center was officially released on October 24, 2020. The released OSB products include daily code biases as well as phase biases at 30-second intervals for four systems: GPS, GLONASS, Galileo and BDS. See here for more details about our OSB product.

With code and phase OSB products directly applied to raw GNSS observations, precise positioning can be carried out efficiently. More than one hundred reference stations from IGS MGEX networks are selected for OSB estimation and the estimation are automatically executed at UTC 8:00 each day.

The Multi-frequency OSB products can be download in here.