ADS-GM1 GPS Receiver

Please note that the GPS model pictured has been discontinued. The unit you receive will be functionally equivalent but may differ slightly in technical specifications from those shown below.

The ADS-GM1 is a high-sensitivity GPS receiver based on the SiRFstar III chipset. It has a 2-meter long cable terminated in a female DB9 connector that allows direct connection to an OpenTracker+, Tracker2, or any other device that provides regulated 5-volt power on pin 4.

• SiRFstar III high-sensitivity chipset


• Waterproof housing (IPX7 rating)


• Built-in low noise, high gain antenna


• Magnetic base


• LED clearly indicates positioning status


• No configuration required


• 20 channel all-in-view tracking

Sensitivity: -159 dBm typical

Accuracy: < 10 meters 2D RMS, < 7 meters WAAS corrected, time to 1 microsecond

Datum: WGS84

Acquisition Rate: 1 sec hot start, 42 sec cold start

Dynamic Limits: < 18,000 meters, < 1000 knots, < 4G acceleration

Power Supply: 5 VDC +/- 5%, 80 mA max, 55 mA typical

Interface: NMEA-0183 at 4800 baud, optional SiRF binary

NMEA Messages: GGA, GSA, GSV, RMC, and optionally VTG, GLL, and ZDA

Weight: 85 grams

LED flashes red to indicate valid GPS fix. Made in Taiwan.