Our observable-specific signal bias (OSB) products are estimated with observations from MGEX stations and released in Bias-SINEX formats.

With our OSB corrections directly applied to raw GNSS observations, precise positioning can be carried out efficiently.

The code OSB products are generated synchronously in the process of differential code bias (DCB) estimation. With ionosphere-free (IF) constraints, pseudo-absolute code biases of reference signals in the clock bias estimation are obtained. Then, other code OSBs are recovered by the combination of code biases on reference signals and corresponding DCB values.

The phase OSB products are generated based on our WL, EWL and NL UPD products and code OSB products obtained in advance.

The flowchart of OSB estimation is shown in the Fig.1.