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The GT Plus Oncore builds on the successful
automotive GPS receivers. Start with the GT Oncore, add a second
comm port, add RTCM and NMEA support, add a more precise 1 PPS,
add a velocitiy filter, add higher antenna feed current, add
an LNA option for passive antenna support and you have the GT
Plus!
- The GT Plus has a second comm port
to support RTCM differential correction input. Baud rates of
2400, 4800, and 9600 are supported.
- The GT Plus supports NMEA output on
the main comm port at 4800 baud. All seven standard NMEA messages
on the VO Oncore are implemented (GGA, GGL, GSA, GSV, RMC, VTG,
ZDA).
- The GT Plus has a velocity filter with
a user-selectable time constant.
- The GT Plus has an altitude-hold function.
- The Mask Angle Select command has been
implemented to allow the user to set the satellite mask angle.
The default is 0 degrees.
- The GT Plus has a 1PPS accuracy of
+/- 500 ns.
- The +5 VDC antenna feed maximum current
is 80 mA instead of 45 mA.
- The GT Plus has the ground plane connected
to the mounting holes. Also, the RF shields located on the printed
circuit board are grounded at several points rather than just
one point.
- 8 channel parallel / 8 simultaneus satellite vehicles
- L1-Band, 1575.42 MHz
- C/A code (1.023 MHz chip rate)
- Code plus carrier tracking (carrier aided tracking)
- Dynamics: Velocity: 1000 knots (515 m/s), 60'000 feet
- Acceleration: 4 G
- Vibration: 7.7 G per Military Standard 810E
- Acquisition Time: 20 sec. typical with current almanac, position, time and ephemeris
- 45 sec. typical with current almanac, position and time.
- 2,5 sec. typical reacquire.
- Positioning Accuracy: Less than 25 meters, SEP (without SA)
- DGPS accuracy 1-5 meters typical
- Timing Accuracy: 130 nanosec. with SA
- In position hold mode < 50 nanosec.
- Datums: 49 std. datums, 2 user defined, default WGS-84
- Output Messages: Latitude, longitude, height, velocity, heading, time, satellite tracking status (Binary Protocoll)
- NMEA-0183 Version 2.00
- Power Requirements: 5 +/- 0.25 VDC 50 mVp-p ripple (max)
- 3V on-board battery
- Power Consumption: 1.1 W @ 5 V
- Dimensions: Receiver: 50.8 x 82.6 x 16.3 mm
- Weight: 51 g
- Connectors: Data/Power: 10 pin (2 x 5) unshrouded header on 0.100" centers
- RF: Right Angle OSX (subminiature snap-on).
- Operating Temperature: Receiver Module -30°C to + 85°C.
- Humidity: 95% noncondensing + 30°C t0 + 60°C.
- Altitude: 60'000 ft. (18 km)
- DGPS: Differential GPS-standard software feature
- RTCM-104 format (remote input)
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