Trimble 4700/5700/R7 - RTK Cheatsheet

The following are suggested settings for most UNAVCO-supported RTK surveys. For a detailed how-to on RTK surveys, see Trimble 4700/5700/R7 - How to execute a real-time kinematic (RTK) survey from start to finish (/questions/617/).

Things to know before and during the survey:

Base GPS antenna type: _____________ (usually Zephyr Geodetic)

Rover GPS antenna type: _____________ (usually Zephyr or Zephyr Geodetic)

Base GPS antenna height measurement method: _____________ (usually "Bottom (or Top) of notch" or "Bottom of antenna mount")

Rover GPS antenna height measurement method: _____________ (usally "Bottom of antenna mount")

Base station coordinates: _____________ N/S latitude, _____________ E/W longitude, _____________ height (meters)

In the job:

Coordinate system: Yes choose one, e.g. the appropriate UTM zone: [link]. Datum: WGS 1984, Use geoid model: No, Use datum grid: No, Project height [enter approximate average survey elevation], Coordinates: Grid.

In the survey style:

Select "RTK" if you don’t need raw data or "RTK & infill" if you do.

Rover options

Logging device (RTK & infill only): Controller
Auto file names ("RTK & infill" only): Yes
Logging interval ("RTK & infill" only): depends on survey goals; usually 1-15 seconds
Broadcast format: CMR+ [MUST be the same as the Broadcast format in Base options]
WAAS: Off
INS position: RTK only (TSC1)
Use station index: Any
Prompt for station index: Yes
Satellite differential: Off (TSCe)
Elevation mask: 13 00’00"
PDOP mask: 6 (but can be more, e.g. 20)
Antenna height, Type, and Meas. to can be modified during the survey

Rover radio

Type: Trimble internal, Trimble 450/900 if using the UNAVCO EAR RTK set
Route through controller: Leave blank (TSCe)
Receiver port: Port 3

Base options

Logging device (RTK & infill only): Receiver
Auto file names (RTK & infill only): Yes
Logging interval (RTK & infill only): Must be at least as frequent as rover, e.g. 1-15 seconds
Broadcast format: CMR+ [MUST be the same as the Broadcast format in Rover options]
Output additional code RTCM: No/blank
Station index: 29
Elevation mask: 13 00’00"
Antenna height, Type, and Meas. to can be modified at survey start

Base radio

Type: TRIMMARK 3 if using the UNAVCO EAR RTK set. Pacific Crest if using the UNAVCO OPP equipment
Controller port: COM1
Receiver port: Port 3

Topo point

Auto point step size: 1
Quality control: QC1&QC2
Auto store point: Yes
Occupation time: 0m 5s
Number of measurements: 3
Horizontal precision: 0.015m
Vertical precision: 0.020m

On the base radio, if a Trimble TRIMTALK III

Channel: 3, 461.1000Mhz
Mode: Base w/No Rpt (unless you are using a repeater)
Transmit Power: depends on survey
Channel Sharing: Off
Wireless Mode: TM3 19200 bps
Port 1 Cfg: 38400-8-None-1
Device Status: Call Sign OFF