Main calculations of separate HDOP/PDOP values of GPS, GLONASS, Galileo and BeiDou are made by GNSS modem. Modem calculates these values, FMB device calculates average HDOP/PDOP from these 4 GNSS systems with a formula below. | Main calculations of separate HDOP/PDOP values of GPS, GLONASS, Galileo and BeiDou are made by GNSS modem. Modem calculates these values, FMB device calculates average HDOP/PDOP from these 4 GNSS systems with a formula below. |