TERRASTAR-M Positioning Service is a worldwide GNSS enhancement service designed for people needing highly accurate position information. TERRASTAR-M uses C/A Code and L1 carrier observations to deliver meter-level position precision.
TERRASTAR-D Positioning Service is designed to provide decimeter-level position precision worldwide. The service is supported by Precise Point Positioning (PPP), which removes or minimizes any errors created by the GNSS system by estimation.