... transmitter for Base (Optional) 2.Initializing Time: 10S integrated dual-frequency GNSS receiver X90 InformationCHC X90GNSS Receiver combines a dual ... -frequency GNSS receiver, GNSS antenna, UHF datalink, GPRS Module (Optional), ... ) RMS Data FormatRTCM2.1, RTCM 2.3, RTCM 3.0, CMR, RTCA, input and outputNMEA0183 outputs, GSOF outputs Physical ...