This the GlobalSat EM-411 20-channel GPS module based on the Sirf Star III chipset, and supports the NEMA 0183 protocol. They are very easy to interface with.

Measuring about 30mm X 30mm x 10.5mm, they are small integrated package and include on-board voltage regulation, LED status indicator, SuperCap backed RAM, and an integrated patch antenna. The interface cable is included.

I have included a link to documentation and some example source code. Sparkfun also sells a breakout board that will work with this GPS. You will find it here

These are USED units but were all removed from working equipment and as such, they are not COSMETICALLY perfect. In the pictures you may notice some black bits on the module. When I removed these modules from the device they were installed in, they were secured into place using some type of black silicon based adhesive. It does not affect them in any way and I try to remove as much as I can (which is most of it) I suspect the remainder could be removed with a bit of rubbing alcohol.

Accuracy

Position: 10 meters, 2D RMS 5 meters, 2D RMS, WAAS enabled Velocity: 0.1 ms Time: 1ms synchronized to GPS time

Acquisition Time

Reacquisition: 0.1 sec., average Hot Start: 8 sec., average Warm Start: 38 sec., average Cold Start: 42 sec., average

Dynamic Conditions

Altitude: 18,000 meters (60,000 feet) max Velocity: 515 meters/second (1000 knots) max

Power

Main Power Input: 4.5V~6.5V DC Input Power Consumption: 60mA (35mA trickle mode) Backup power: +2.5V to +3.6V Backup current: 10uA typical

Protocol

Electrical Level: TTL level, Output Voltage Level: 0V~2.85V Baud Rate: 4800 bps Output Message: NMEA 0183 GGA, GSA, GSV, RRMC (VTG, GLL optional)

Physical Characteristics

Dimensions: 1.181” x 1.181” x 0.413” (30mm x 30mm x 10.5mm) Operating Temperature: -40F to +176F (-40C to +85C) Humidity: Up to 95% non-condensing