HOLUX GR-87 gps module

General
Frequency: L1,1575.42MHz
C/A Code: 1.023MHZ chip rate
Channels: 20
TIMEMARK-1PPS Pulse
Level CMOS 3V Pulse duration 1 microsecond.
Time reference At the pulse positive edge.
Measurements Aligned to GPS second, 1 microsecond.
Datum
Default WGS-84
Other Support different datum by request
Physical Characteristics
Active Size: 25.4(W) x 25.4(D) x 7(H) (mm)
Weight: 2 g
Interface connector 6-pin straight male header, 1.25 mm pitch
Environmental Characteristics
Operating temperature range : -10 ÿ?to +60 ÿ?
Storage temperature range: -20 ÿ?to +85 ÿ?
Power :
Input power 3.3V - 5.5VDC
Input current: Less than 80 mA (without antenna)
Backup power: 3V Rechargeable Lithium cell battery, up to 500 hours discharge.
Accuracy (Open Sky)
Position ?10 meters, 2D RMS .
7 meters 2D RMS, WAAS corrected
1-5 meters, DGPS corrected
Altitude < 35m Vertical in term of 95%
Velocity 0.1 meters/second
Time 1 microsecond synchronized to GPS time
Acquisition Rate (Open sky, stationary requirements)
Reacquisition: 0.1 sec., average.
Hot start: 1 sec., average.
Warm start: 38 sec., average.
Cold start: 42 sec., average.
Interface
Antenna connector type: MMCX, output 2.8 VDC. (optional output VCC_IN).
Minimum signal tracking: -159 dBm.
Two full duplex serial communication, CMOS interface, with user selectable baud rate (4800-Default, 9600, 19200, 38400)
NMEA 0183 Version 2.2 ASCII output (GGA, GSA, GSV, RMC (VTG , GLL and ZDA for optional)) .
SiRF binary-position, velocity, altitude, status output