低成本的gps模块GM20

The Skylab GM20 base on Atheros chipsis a complete GPS module that features super sensitivity, ultra low power and small form factor. The GPS signal is applied to the antenna input of module, and a complete serial data message with position, velocity and time information is presented at the serial interface with NMEA protocol or custom protocol.Its -160dBm tracking sensitivity extends positioning coverage into place like urban canyons and dense foliage environment where the GPS was not possible before. The small form factor and low power consumption make the module easy to integrate into portable device like PNDs, mobile phones, cameras and vehicle navigation systems.Performance Specification Parameter Specification Receiver Type L1 frequency band, C/A code, 20-channels Sensitivity Tracking Acquisition -160dBm -144dBm Accuracy Position Velocity Timing (PPS) 3m 2D RMS without SA0.1m/s without SA 60ns RMS Acquisition Time Cold Start Warm Start Hot Start Re-Acquisition 36s 30s 2s <1s Power Consumption Tracking Acquisition Sleep/Standby 35mA @ 3V Vcc 35mA 1mA Navigation Data Update Rate 1Hz Operational Limits Altitude Velocity Acceleration Max 18,000m Max 515m/s Less than 4g