Trimble-Lassen SK8
Trimble-Lassen LP
uBlox PS1
GPS Receivers
The Trimble SK8 (5.0 volts power, $35) and LP (3.3 volts power, $25) each monitor 8 satellites.  The LP is a low
power version of the SK8, and both receivers output NMEA or TSIP messages on serial port 1.  The uBlox ($80)
monitors 12 channels, and outputs NMEA or SIRF messages on serial port 1.  All receivers accept RTCM-SC104
differential GPS corrections on serial port 2.
1.575 Ghz LNA