The Deluo GPS PRO SiRF Star III (approximate price in Lebanon with Shipping and Tax: 85$) Features: Compact, high sensitivity GPS receiver from Deluo with a 6-foot (2-meter) cable and female mini-DIN connector. The SiRF III chipset gives this unit greatly increased performance indoors and in locations with heavy tree cover.   Receiver Tracking up to 20 satellites L1, 1575.42 MHz, C/A code Accuracy Position: approximately 5m, WAAS support Time: 1µ sec Acquisition Hot Start: 1 sec. (Average) Warm Start: 38 sec. (Average) Cold Start: 42 sec. (Average) Dynamics Altitude: 18,000m (Max.) Velocity: 515m/sec (Max.) Acceleration: 4G (Max.) Sensitivity Acquisition: -148dBm Tracking: -159dBm Navigation update rate Once per second Protocol NMEA 0183 2.2 / SiRF Binary NMEA Messages NMEA0283 V2.2 GGA, GSV, GSA, RMC (optional VTG, GLL) Serial port TTL, RS-232 Baud rate 4800bps (optional 9600,19300, 38400) Coordinate Datum WGS-84 Power supply DC 3.3~5V Power consumption Typical 80mA @5V LED indicator Power On/Off Operating Temperature -40ºC ~ +85ºC Storage Temperature -40ºC ~ +100ºC Operating Humidity 5% ~ 95% Antenna type Built-in patch antenna Has a strong magnet inside for mounting to metal surfaces. The Deluo WAAS GPS (approximate price in Lebanon with Shipping and Tax: 60$) This GPS receiver operates on 5 volts. Exceeding the rated voltage will very likely destroy the device, so be careful when connecting it. Adapters are available for connection to a PC or to an OpenTracker. Satellites:Tracking up to 12 satellites L1,1575.42MHz, C/A code Cold start: 40 sec(Average) Warm start: 33 sec (Average) Navigation update rate: Once per second Serial Port: TTL and RS-232 Baud Rate: 4800bps (optional 9600 bps, 19200 bps, 38400 bps) Output Message: NMEA 0183 V2.2 GGA, GSV, GSA, RMC, (optional VTG,GLL) Datum: WGS 84 Power supply: DC 5.0V 5% Power consumption: Typical (tracking): 120mW LED Function: Power on/off and Navigation Humidity: 5%~95% Dimension: 41mm x 41mm Has a strong magnet inside for mounting to metal surfaces. GARMIN GPS 18LVC (approximate price in Lebanon with Shipping and Tax: 80$) The GPS 18 is a small, highly accurate GPS sensor featuring a 12-parallel-channel, WAAS-enabled GPS receiver and an integrated magnetic base. The receiver is 2.4 inches in diameter and weighs just 115 grams, and unlike many other receivers in its class, it can operate at extremely high altitudes, making it a favorite of high-altitude balloon experimenters. The unit defaults to output data in the industry standard NMEA 0183 data format, but may also be user programmed to output data in the GARMIN proprietary format. It also provides a pulse-per-second logic level output whose rising edge is aligned to the UTC second within 1 microsecond. It has a 5 meter cable is terminated in bare wires, with a 6-pin connector installed for factory testing. This connector can be removed and replaced with another connector, or it can be used to mate with JST part number BM06B-SRSS-TBT or SM06B-SRSS-TB connectors. Has a strong magnet inside for mounting to metal surfaces.