Spectra Precision ProMark 800 Reference Manual - Manual (Page 97)

85
RTK Implementation
RTCM3.0 and 3.1. The message types that exist in these
versions are numbered from 1001 to 1029. The most
important ones are listed below.
When a rover is given the capability to decode RTCM
messages 1021, 1022, 1023 and 1025, the position it
computes can be expressed directly in the same local
coordinate system as the one used by the base station that
provides it with RTK corrections.
Through these messages, you can be sure the rover will
automatically use the same transformation parameters as the
base to deliver local coordinates. The projected position
solution can be output through NMEA message GMP.
Message Type Description
Default
Transfer Rate
1001 L1-only GPS RTK observables
1002 Extended L1 only GPS RTK observables
1003 L1 & L2 GPS RTK observables
1004 Extended L1&L2 GPS observables 1 second
1005 Stationary RTK reference station ARP
1006 Base ARP with antenna height 13 seconds
1007 Antenna descriptor
1008 Antenna descriptor and serial number
1009 L1-only GLONASS RTK observables
1010
Extended L1-only GLONASS RTK observ-
ables
1011 L1&L2 GLONASS observables
1012 Extended L1&L2 GLONASS observables 1 second
1013 System parameter
1019 GPS ephemeris data
1020 GLONASS ephemeris data
1021
Helmert / Abridged Molodenski Transforma-
tion Parameters
1022
Molodenski-Badekas Transformation
Parameters
1023 Residuals, Ellipsoidal Grid Representation
1025 Projection parameters
1029 Unicode text string
1033 Receiver and antenna descriptors 31 seconds