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Topcon Positioning System's (TPS) new GRS-1 is the world's first fully integrated dual constellation network enabled RTK rover system. It is an all-in-one handheld GNSS receiver and field controller with highspeed processor, increased memory, built-in camera and compass. Also integrated into the new system are SD memory card slot,
optional internal GSM or CDMA modem, and connectivity via Wireless LAN and Bluetooth® wireless technology.

The GRS-1 (Geodetic Rover System) was designed with two primary system design goals: smaller size and weight, and lower cost. The new receiver has DGPS capability
with internal L1 antenna for use in the GIS and navigation space, add the PGA-1 external antenna and connect to your local GNSS network via the internal modem, and instantly move to dual frequency, dual constellation GNSS centimeter RTK accuracy! The GRS-1 can also be used as a static post processed receiver system.

Utilizing the popular TopSURV surveying software the GRS-1 operates with the Windows Mobile® operating system. Version 7.2.2 of TopSURV adds new features and functions that are unique to the GRS-1 capabilities.


  • GNSS (GPS + Glonass) 72 channel RTK Satellite Receiver
  • GSM and CDMA Internal Cellular
  • 806MHz XScale Processor
  • Windows Mobile® 6.1 Operating System
  • 2.0 megapixel Camera
  • 256MB SDRAM, 1GB Flash
  • Internal Magnetic Compass
  • Built-in Bluetooth® wireless technology and Wireless LAN connectivity

Technical Specifications

Number of Channels 72 GPS + Glonass L1/L2 tracking
CORS Beacon Yes with BR-1
Real-time DGPS <1m HRMS
<50cm with external PG-A5 antenna
PP DGPS Accuracy <30cm with PG-A5
GIS-RTK H: <5cm + 1.0ppm, V: <8cm + 1.0ppm with PG-A1
Onboard Software TopSURV-GIS or 3rd Party
Office Software (post processing) Topcon Tools™ GIS
Microprocessor XScale PXA320
Processor Speed 806MHz
Operating System Windows® Mobile 6.1
Memory 256MB SDRAM
1GB Flash
USB Mini Port
Card Slot SD
Cellular Capability Internal GSM or CDMA
Input/Output Bluetooth®, USB, Serial, ANT, and Power
Wireless LAN Connectivity Standard (Internal, 802.11.b)
Magnetic Compass Internal, 4 degree accuracy
Expansion Connector Weatherproof Communication Port
Battery Life 5 hrs while in GPS static mode
Battery Type 2500mAh Removable, Li-Ion Rechargeable
Dimensions 7.76” x 3.54” x 1.81” (197 x 90 x 46mm)
Weight 1.5 lbs (0.7kg)
Display 3.7” VGA LCD
Built-in Camera 2.0 Megapixel
Keyboard 3 Key plus Virtual Keyboard
Waterproof IP66
Drop 1 meter
Operating Temperature -20° to 50°C
Operating with camera -10° to 50°C
Storage Temperature -30° to 60°C

For more details download brochure:


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