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The APS-3m is a high precision satellite receiver and cellular communications unit specifically designed for Real Time Network in the surveying market.

Integrated with state-of-the-art technology, the APS-3m provides surveyors with high productivity, performance and flexibility.

GPS + GLONASS RTK is delivered in a small and light design for ultra portability. The APS-3m has an internal GSM/GPRS or CDMA modem for easy Real Time Network connection on demand.

For ease of use and simplicity, the APS-3m is completely configurable from the data collector via Bluetooth for Network Rover operation with the internal cellular modem.

APS-3m Features

  • 136 Channel GPS + GLONASS receiver
  • Integrated Quad-Band GSM/GPRS Modem or CDMA Modem
  • Integrated Bluetooth
  • Dual Hot-Swap Li-Ion Batteries with Fuel Gauge
  • Removable min.2 GB SD Card storage

With Altus’s open architecture philosophy, the user has the choice of data collector software from MicroSurvey FIELDGenius or Carlson SurvCE to custom software. Rugged field computers are used to communicate with the APS-3m via Bluetooth for a cable free operation. Furthermore, the APS-3m houses two hot swappable Li-lon batteries for continuous operation. Re-charging is done within a few hours with the included charger.

APS-3m Benefits

Network Rover

  • High capacity hot swappable batteries mean that power supply can be continous for even the longest working sessions
  • Integrated GSM modem for connection to RTK Networks.
  • Data collector software with intuitive ease-of-use enables a fast start for Surveyors with minimal training on product use.
  • Lightweight and compact unit designed for ultra portability.


GNSS Performance

  • Receiver options for GPS, GLONASS, & SBAS are standard, as well as future compatibility with GALILEO, and BeiDou.
  • RTK performance within minutes from cable free operation with wireless devices completely integrated into a compact system.
  • RTK accuracy at 1 cm + 1ppm or post processing at 2mm + 0.5 ppm



  • Avoid radio costs in areas covered by RTK Networks
  • Quad-band GSM module for worldwide cellular use.
  • Removable SD Card enables plug and play raw data transfer for post processing.
  • External DC power input for continuous operation.

APS-3m Specifications

Channels 136
Standalone H: 1.3 m,      V: 1.9 m
DGPS H: 0.50 m,     V: 0.90 m
RTK H: 0.6 cm + 0.5 ppm,     V: 1 cm + 1 ppm
Static H: 2 mm + 0.5 ppm,     V: 5 mm + 0.5 ppm
Output Rate 25 Hz
Measurement Rate 25 Hz
Latency <20 msec
Average Time To Fixed RTK <7 sec
Cold Start <45 sec
Warm Start <20 sec
Re-acquisition <1.2 sec
Integrated Cellular Modem
GSM/GPRS Quad Band or CDMA
850/900/1800/1900 MHz
Integrated Bluetooth Class 2
Memory Storage 2 GB SD card minimum, removable
User Interface
Data Collector or PC
Serial Ports 2 Lemo
Waterproofing IP67
Certification CE, FCC Class B Part 15
Internal Battery 2 x Li-Ion, 5000 mAh, 7.4V
Current Drain 1.0 to 1.5A, 2.75A peak
External Power Input 9 to 18 VDC, Lemo
Weight 1.3 kg
Dimensions 178 mm Dia. X 89.7 mm
Operating Temperature -20 to +65 degrees C
Storage Temperature
-40 to +75 degrees C
Shock/Drop 2 m


Each APS-3m is delivered with 2 x Li-Ion hot swappable batteries,a 2-Bay Battery Charger, a serial cable & a power cable. The APS-3m is ready to use direct from the shipping case.