Topcon SGR-1

Faster satellite acquisition and simultaneous processing of both GLONASS and GPS signals for high levels of accuracy.

Accuracy is enhanced even further by TruPass™ advanced positioning technology, which is included as standard.  In addition, the SGR-1 receives L-band OmniSTAR signals and delivers VBS mode measurements.

As well as  standard GNSS features (such as PPS output), the SGR-1 provides ground speed information as a simulated radar output to enable improved slow speed operations such as seeding and spraying. The compact rugged design provides water and dust protection to IP66 standards. The SGR-1 also provides both Serial and CAN communication capability.



  • Topcon TruPass™ advanced positioning technology
  • Fast, multi-constellation signal acquisition
  • 32 channels for universal L1 GPS/GLONASS/SBAS tracking
  • Up to 20Hz measurement/position update rate
  • Tri-color LED indicator
  • L-band channel for OmniSTAR corrections with VBS
  • Emulated radar out for ground speed simulation
  • Compact, rugged and low cost

How it Works

  • Virtual Road & Lightbar Guidance: The virtual road and lightbar indicator provide improved manual guidance for application.
  • Application Rate Control – Liquid (Option): Application rate control keeps your applied rate constant even with varied vehicle speeds
  • Auto-Section Control (Option): Automatically switches sprayer sections on/off as you cross previously applied areas.
  • Variable Rate Control (Option): Application rate varied from a predefined application map/plan loaded into the controller.
  • Enhanced Data Management: Provides multiple input/output features for maximum data use. Client / Farm / Field / Job menu lets you save multiple fields and tasks for different farms, then create detailed reports for data tracking and multi-year analysis.
  • Automatic Coverage Mapping: Automatically builds colour coverage maps. Coverage mapping makes it easy to identify missed areas or overlaps.

Ideal For

  • Autosteering
  • Seeding & Planting
  • Spraying & Spreading



5.12″ x 2.36″, 130 x 60 mm


1.41 lbs, 640g


5/8-11 UNC female, or magnetic base for ferrous roof


12 pin extended Deutsch DTM

Operating Temperature

-40° C to +85° C

Storage Temperature

-40° C to +85° C


+9 to +28 VDC


2.5 W@12VDC typical


L1 GPS/GLONASS with L-band compatibility

RF Input Frequencies

1530 MHz – 1610 MHz

PPS Output

5 ns resolution, 30 ns pulse-to-pulse precision, LVTTL, configurable polarity and period

Radar Output

Variable frequency, simulated ground speed output

Data Input / Output

RS-232, 2 ports up to 460.8 kbps w/o flow control CAN, 1 port, NMEA2000 compliant

SV Tracking Channels

32 GPS L1 C/A, GLONASS L1 C/A code & carrier, SBAS

Acquisition Time (TTFF)

hot <10 sec, warm <35 sec, cold <60 sec reacquisition <1 sec

Data Formats

NMEA 0183 versions 2.1, 2.2, 2.3 and 3.0 output proprietry (TPS) data format , NMEA2000 compliant RTCM SC104 versions 2.1, 2.2, 2.3 and 3.0 input/output geoid & magnetic variation models, grid coordinates

Data Rates

Raw measurements and position, up to 20 Hz

Position Standalone

hor. 2m, vert. 3m

Position Code differential

(DGPS with external correction) hor. 0.4m, vert. 0.6m

Position OmniSTAR VBS

hor. 0.9m, vert.


0.03 m/sec


20 nsec RMS

Measurement Precision

L1 C/A code < 0.5m
L1 Carrier Phase < 2mm

Step by step guide to finding the right precision solution for your farm business.

Step 1. Select application

Step 2. Select your machine



Step 3. Select precision solution