HOLUX GR-87, HOLUX GR87 GPS MODULE

Product Description

Main Features
Build on high performance SiRF StarIII chipset.
Average Cold Start time and under 45 seconds.
Low power consumption
20 channels “All-in-View” tracking.
200, 000+ effective correlators for fast TTFF and high sensitivity acquisitions
Integrated ARM7TDMI CPU with software engineering services and available for embedded customer defined applications.
On chip 1Mb SRAM.
Dual TTL level serial ports with one for GPS receiver command message interface, another one for RTCM-104 DGPS input.
Compact Board Size 1”x1”x0.27” (25.4x25.4x7mm) for easy integration into hand-held device.
Reacquisition Time 0.1 seconds
Support Standard NMEA-0183 and SiRF Binary protocol
Support Accurate 1PPS Output Signal Aligned with GPS Timing
Multi-path Mitigation Hardware
On-board RTCM SC-104 DGPS and WAAS /EGNOS Demodulator
Built-in a lithium battery make GPS fast positioning
2. Technical Specifications
2.1. Electrical Characteristics
2.1.1 General
1). Frequency: L1, 1575.42 MHz
2). C/A code: 1.023 MHz chip rate
3). Channels：20
2.1.2 Accuracy (Open Sky)
1). Position：10 meters, 2D RMS
2). 7 meters 2D RMS, WAAS corrected
3). 1-5 meters, DGPS corrected
4). Altitude ：< ± 35m Vertical in term of 95%
5). Velocity：0.1 meters/second
6). Time 1 microsecond synchronized to GPS time
2.1.3 Datum
1). Default：WGS-84
2). Other Support different datum by request
2.1.4 Acquisition Rate (Open sky, stationary requirements)
1). Reacquisition：0.1 sec., average
2). Snap start：2 sec., average
3). Hot start：8 sec., average
4). Warm start：38 sec., average
5). Cold start：42 sec., average
2.1.5 Dynamic Conditions
1). Altitude : 18, 000 meters (60, 000 feet) max
2). Velocity：515 meters/second (1000 knots) max
3). Acceleration: 4g, max
4). Jerk：20 meters/second, max
2.1.6 Power
1). Input power input：3.3 ~ 5.5 VDC input
2). Input current: Less than 80 mA (without antenna)
3). Backup power: 3V Rechargeable Lithium cell battery, up to 500 hours discharge
2.1.7 RF interface
1). Antenna connector type: MMCX, output 2.8 VDC. (Optional output VCC_IN)
2). Minimum signal tracking: -159 dBm
2.1.8 Serial Port
1). Two full duplex serial communication, CMOS interface, with user selectable baud rate (4800-Default, 9600, 19200, 38400)
2). NMEA 0183 Version 2.2 ASCII output (GGA, GSA, GSV, RMC (VTG, GLL and ZDA for optional))
3). DGPS protocol RTCM SC-104 message types 1, 2 and 9
4). SiRF binary-position, velocity, altitude, status output
2.1.9 TIMEMARK-1PPS Pulse
1). Level CMOS 3V
2). Pulse duration 1 microsecond
3). Time reference At the pulse positive edge
4). Measurements Aligned to GPS second, ±1 microsecond
2.2. Environmental Characteristics
1). Operating temperature range -10 ° C to +60 ° C
2). Storage temperature range -20 ° C to +85 ° C.
2.3. Physical Characteristics
1) Active Size: 25.4(W) x 25.4(D) x 7(H) (mm)
2) Weight: 2 g
3) Interface connector 6-pin straight male header, 1.25 mm pitch

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