Sep 26, 2022 · SOUTH SURVEYING & MAPPING TECHNOLOGY CO., LTD. Add: South Geo-information Industrial Park, No.39 Si Cheng Rd, Guangzhou, China ... Differential format: CMR(GPS only), CMR+(GPS only), RTCM 2.3, RTCM 3.0, RTCM 3.1, RTCM 3.2 Navigation data format: NMEA 0183, PJK, Binary code Network model support: VRS, FKP, MAC, fully support NTRIP protocol ...