User Manual
User Manual
5
1. SMART DGPS RECEIVER
This SMART DGPS RECEIVER is based on a ultimate 16 channels GPS engine that
delivers accuracy better than three meters by decoding the GPS correction sig-
nals from the satellite-based WAAS (
Wide Area Augmentation System
). The GPS
engine, interface electronics and the passive antenna are enclosed inside the
water-proof plastic housing. This provides advanced state of the art GPS perform-
ance in an easy to use package.
1.1
TECHNICAL SPECIFICATIONS
1.1.1 Physical Characteristics
♦
Color
: Ivory white
♦
Dimensions
: 97mm in diameter x 32mm in height (flush
mounted) or 61.5mm on flag-pole mount
♦
Weight
: 160 grams (without cable)
♦
Cable GSU
: white 15 meter 8x28AWG cable with 6
pins female connector
♦
Cable GSU with connector : white 15 meter 8x28AWG cable with 6
pins female and 8 pins female connectors
1.1.2 Electrical Characteristics
♦
Input Voltage
: 10 Vdc to 35 Vdc unregulated
♦
Power Consumption
: 0.8 W max
♦
Electrical Interface
: TTL voltage levels, RS-232 polarity
1.1.3 Performance
♦
Receiving Method
: 16 channels parallel (up to 3 for WAAS
Satellites)
♦
Receiving Frequency
: 1575.42MHz (L1, C/A code)
♦
Receiving Sensitivity
: Less than -134 dBm
♦
Time to First Fix (TTFF)
Warm Start : 33 seconds (typical)
Cold Start : 40 seconds (typical)
♦
Accuracy
Position
: Less than 2.5mCEP
1
5.0mSEP
2
: GPS:(SA=OFF; HDOP<4)
Less than 2.0mCEP
1
3.0mSEP
2
: DGPS:(SA=OFF; HDOP<4)
♦
Dynamics
Acceleration : Strong Signals <= 4g
Weak Signals typical 1g
Altitude
3
: 18000m
Velocity
3
: 1850Km/h (515 m/sec)
♦
DGPS format
: WAAS; EGNOS; MSAS
♦
Output format
: NMEA-0183 Baud rate 4800 N81
♦
NMEA Output messages
: GGA, RMC, GSA, GSV, TXT
♦
Geodetic Datum
: WGS84
NOTE
1
CEP = Circular Error Probability: The radius of a horizontal circle, centered at
the antenna's True position, containing 50% of the fixes.
8
Fig. 1.4.1b - Installing GPS Antenna (III)
1.4.2 Dimensions
60mm
[2.63"]
41mm
[1.61"]
98mm
[3.86"]
Fig. 1.4.2 - GPS Antenna Dimensions
