GPS/GSM 20-70 30g Transmitter

GPS/GSM 20-70 30g TransmitterFeatures

  • Solar-powered, rechargeable battery
  • Microprocessor-controlled power management
  • Internal multi-channel micro-power GPS receiver
  • SBAS capable (WAAS, EGNOS, and QZSS)
  • GPS horizontal accuracy ±18 m
  • GPS vertical accuracy ±22 m
  • GPS resolution 0.00001 degree (~1 meter at equator)
  • Dynamically adjusting GPS fix rate (1-minute minimum with current software version)
  • Archive capacity of up to 258,000 locations
  • Operating lifetime up to 3 years

Dimensions* Length: 2.60 in (6.60 cm)  x  Width: 0.92 in (2.34 cm)  x  Height: 0.87 in (2.21 cm)
Antenna: 3.35 in (8.51 cm) protruding from the back edge of the transmitter 45 degrees to the bottom face
Sensors GPS (latitude, longitude, altitude, speed, course, HDOP, VDOP, and number of GPS satellites), temperature, battery voltage, activity
Construction The housing is constructed from a lightweight glass-reinforced epoxy composite material with a contiguous interior metal-plated coating. The unit is hermetically sealed with a metal-to-metal solder joint providing stability during changes in temperature and humidity.
Attachment options Backpack (with standard neoprene cushioning pad), leg band**
Color options Standard or Matte Finish: classic, dark brown, medium brown, gray, white, black
Matte Finish Only: desert sand, brown sand, black sand
Example species Ferruginous Hawk, Red-tailed Hawk, Osprey
* Harnessing loops and neoprene pad not included in these dimensions.
** Customer must supply leg band at least 4 weeks prior to scheduled delivery. Be advised that the combined weight of the PTT and leg band will exceed 30 grams.


With our GSM units, users can gain a more thorough understanding of bird movement patterns than ever before. Some researchers have used the GPS/GSM 20-70 30g Transmitter alongside its Solar Argos/GPS counterpart to track birds that travel through areas inside and outside the reach of the GSM network. By strategically using both models on different birds from a single population, researchers can monitor a wider range of their study subjects' movements.

The housing of the 30g model is effective for minimizing feather coverage of the solar array, and its battery size and solar array create an optimal balance of fast charging and power reserve.