Standar GPS module SKG25A1

1.Introduction
The Skylab SKG25A1 is 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

2.Features:
Ultra high sensitivity: -160dBm
Extremely fast TTFF at low signal level
Built in high gain LNA
Low power consumption: Max 35mA*3.3V
NMEA-0183 compliant protocol or custom protocol
Operating voltage: 2.8V to 3.3V
SMD type with stamp holes
Small form factor: 25x25x3.2mm
RoHS compliant (Lead-free)Performance Specification

3.Performance specification
Receiver Type
-L1 frequency band, C/A code, 20-channels

Sensitivity
-Tracking -160dBm
-Acquisition -144dBm

Accuracy
-Position 3m CEP without SA
-Velocity 0.1m/s without SA
-Timing (PPS) 60ns RMS

Acquisition Time
-Cold Start 36s
-Warm Start 30s
-Hot Start 2s
-Re-Acquisition <1s

Power Consumption
-Tracking 35mA @3V Vcc
-Acquisition 35mA
-Sleep/Standby TBD

Navigation Data Update Rate
-1Hz

Operational Limits
-Altitude Max 18, 000m
-Velocity Max 515m/s
-Acceleration Less than 4g