Product Manual

91
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 and 1023, the position it computes
can be directly expressed 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.
RTK Position Output
RTK Position
Output Mode
Definition
Some field applications require the fastest possible position
output rate whereas some others can do with a slower output
rate provided the position accuracy is maximum.
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
1029 Unicode text string
1033 Receiver and antenna descriptors 31 seconds