Detailed function

USB GPS RECEIVER
(GPS-Dongle GD-75)
Introduction
USB GPS Dongle (GD-75) is a highly sensitive USB GPS receiver with low power
consumption. It is built with SiRF III GPS Chips architecture. It is very suitable for
UMPC, Laptop, mobile, and devices which have map software installed.

Features:
* Builds on SiRFstarIII chipset with embedded ARM7TDMI CPU available for customized applications in firmware.
* 20 parallel satellite-tracking channels for fast acquisition and reacquisition.
* 200,000 effective correlators for fast TTFF (Time-To-Fast-Fix), and Extremely fast TTFF’s at low signal level.
* Built-in hardware Tracking Loop Processor WAAS/EGNOS Demodulator support.
* Built-in repeatable and rechargeable Lithium-ion battery for Time- to- First-Fix (TTFF).
* Support NMEA 0183 v2.2 data protocol.
* Enhanced algorithms provide superior navigation performance in urban, canyon and foliage environments.
* For Car Navigation, Marine Navigation, Fleet Management, AVL and Location-Based Services, Auto Pilot, Personal Navigation or touring devices ,Tracking devices/systems and Mapping devices application.

Specifications
-Tracks up to 20 satellites.
-Receiver: L1, C/A code
-Max update rate: 1 HZ.
-Acquisition time
Reacquisition 0.1sec. averaged
Hot start 1 sec., averaged
Warm start 38 sec., averaged
Cold start 42 sec., averaged
Position accuracy
Non DGPS (Differential GPS)
Position 5-25 m CEP without SA
Velocity 0.1 m/sec, without SA
Time 1 usec sync GPS Time
EGNOS/WAAS：
Position < 2.2 m, horizontal 95% of time < 5 m, vertical 95% of time
Dynamic Conditions: Altitude 18,000 meters (60,000 feet ) max Velocity 515 meters / second (700 knots) max
Acceleration 4 G, max Jerk 20 meters/second, max
Antenna Type: Built in Patch Antenna
Minimum signal tracked: -159dBm
Dimension: 74 ª 25 ª 14 mm
Weight : 23g
Waterproof: IPX7
LED function: Power On/Off and Navigation
Update Indication
Operating temperature: -40 to +80
Storage temperature: -45 to +100
Operating humidity: 5% to 95% No condensing.
Power consumption < 80mA at 4.5- 5.5V input
Protocol and interface:
NMEA output protocol: V.2.2
Standard:
Baud rate: 4800 bps
Data bit: 8
Parity: N
Stop bit: 1
Interface: USB PORT