The SatRef system produces the Network RTK correctional data stream to users by means of the SatRef NTRIP server. Users can obtain the correctional data stream via the internet. The real-time positional accuracy of Network RTK is about 3-5cm. It can be applied in topographic mapping, monitoring of structural movement (e.g. building, bridge), machine guidance, etc.
The SatRef system produces the DGNSS correctional data stream to users by means of the SatRef NTRIP server. Users can obtain the DGNSS correctional data stream via the internet. The real-time positional accuracy of DGNSS is about 1-2m. It can be applied in navigation (land and sea), fleet management, location based services, mobile GIS systems, etc.
If you want to apply this service (Free of charge), please fill in the application form and return it by fax or email to geodetic@landsd.gov.hk.
Hostname: | www.geodetic.gov.hk |
Port: | 2101 |
Login: | Your Username and Password |
Access Point Name (APN): | If you connect to our NTRIP server through Mobile Telecommunications Services, please check the APN setting with service provider. |
Radio Technical Commission for Maritime Services (RTCM) Standard is used in this service.
Mountpoint | ![]() |
VRS_1023 | VRS_1024 | VRS | FKP31 | FKP | FKP23 | DGPS | |
---|---|---|---|---|---|---|---|---|---|
Type | Network RTK | DGNSS | |||||||
RTCM format | v3.2 | v3.1 | v3.1 | v3.1 | v3.1 | v3.0 | v2.3 | v2.2 | |
Network Type | VRS | FKP | N/A | ||||||
Satellite System | GPS GLO GAL BDS |
GPS GLO |
GPS GLO |
GPS GLO |
GPS GLO |
GPS GLO |
GPS | GPS GLO |
|
Remarks | with Geoid Correction | - | - | - | - | Use HKSC or HKPC as reference | |||
Message Type |
Message Name | RTCM 3 Message Type Included | |||||||
1004 | Extended L1&L2 GPS RTK Observables | √ | √ | √ | √ | √ | |||
1006 | Stationary RTK Reference Station ARP with Antenna Height | √ | √ | √ | √ | √ | √ | ||
1008 | Antenna Descriptor & Serial Number | √ | √ | √ | √ | √ | √ | ||
1012 | Extended L1&L2 GLONASS RTK Observables | √ | √ | √ | √ | √ | |||
1013 | System Parameters | √ | |||||||
1019 | GPS Ephemerides | √ | √ | ||||||
1020 | GLONASS Ephemerides | √ | √ | ||||||
1021*1 | Helmert Transformation Parameters | √ | √ | √ | |||||
1023 | Residuals, Ellipsoidal Grid Representation | √ | √ | ||||||
1024 | Residuals, Plane Grid Representation | √ | |||||||
1025 | Projection Parameters | √ | √ | √ | |||||
1029 | Unicode Text String | √ | |||||||
1030 | GPS Network RTK Residual Message | √ | √ | √ | √ | ||||
1031 | GLONASS Network RTK Residual Message | √ | √ | √ | √ | ||||
1032 | Physical Reference Station Position Message | √ | √ | √ | √ | √ | |||
1033 | Receiver and Antenna Descriptors | √ | √ | √ | √ | √ | √ | ||
1034 | GPS Network FKP Gradient | √ | |||||||
1035 | GLONASS Network FKP Gradient | √ | |||||||
1075 | GPS MSM5 | √ | |||||||
1085 | GLONASS MSM5 | √ | |||||||
1095 | Galileo MSM5 | √ | |||||||
1125 | BeiDou MSM5 | √ | |||||||
1230 | GLONASS L1 and L2 Code-Phase Biases | √ | |||||||
Message Type |
Message Name | RTCM 2 Message Type Included | |||||||
1 | Differential GPS Corrections | √ | √ | ||||||
3 | Reference Station Coordinates | √ | √ | ||||||
14 | GPS Time | √ | √ | ||||||
16 | Special Message (ASCII text) | √ | √ | ||||||
20 | RTK Carrier Phase Corrections | √ | |||||||
21 | RTK Pseudorange Corrections | √ | |||||||
22 | Extended Reference Station Parameters | √ | |||||||
23 | Antenna Description | √ | |||||||
24 | Coordinates of Antenna Reference Point (ARP) | √ | |||||||
31 | Differential GLONASS Corrections | √ |
*1 In order to fulfill the requirement of RTCM Standard, the 7-P datum transformation parameters transmitted in Message Type 1021 are slightly different from the published 7P_ITRF96_HK80_V1.0 data sheet.
(Rotation parameters: round to the nearest 0.00002"; Scale: round to the nearest 0.00001ppm)
Remark:
For more details, please refer to NTRIP source table.
Please check the technical specifications of your receivers for selection of the most appropriate type of service and compatible RTCM format. For GNSS receiver settings, please refer to this link or contact with vendor.
Tel : | (852) 3168 2666 |
Fax : | (852) 3168 2668 |
Email : | geodetic@landsd.gov.hk |