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Position GPS/GNSS


Aardvark DR+GPS Produit Trimble


Aardvark DR+GPS
When GPS alone is just not good enough
The Trimble® Aardvark DR+GPS combines dead reckoning (DR) with GPS to produce accurate and instantaneous positions, even under the most difficult conditions. For service providers tracking highvalue or perishable cargo, Aardvark DR+GPS dramatically improves quality of service (QoS). Dead reckoning (DR) estimates position based on heading and distance traveled since the last known position. The more accurate the speed, time and heading inputs, the more accurate the dead reckoning.

This is where GPS helps. GPS continuously calibrates the gyro and speed sensors to produce optimal dead reckoning. Aardvark DR+GPS has an on-board gyro sensor and accepts inputs from an odometer pulse and a forward/ reverse indicator. Its sophisticated DR+GPS algorithm autocalibrates these sensors and optimally blends the sensor inputs and GPS to produce accurate position and velocity outputs in the most hostile GPS environments.

The Aardvark DR+GPS comes in two flavors: the -30 that must be flat mounted and the -50 that can be mounted in any orientation.
The -50 version contains a three axis gyro and sophisticated algorithms module to be mounted in any orientation on your vehicle and still output the highest quality position and velocity measurements.

Aardvark DR+GPS Technical Data

  • DR positioning solution with integrated GPS receiver and gyro sensor
  • SMT form factor 19 mm x 19 mm x 2.54 mm
  • Supports both NMEA and HIPPO binary protocols
  • Automatic calibration of external sensor inputs
  • Accepts Map Match Inputs
Performance Characteristics :
Fully calibrated and stable system, clear view accuracy
For GPS performance characteristics, refer to the Trimble Condor GPS Receiver datasheet
Receiver Type GPS Single Frequency L1, SBAS capable
Position Update Rate (DR) 5 Hz (Default) with 10 Hz Option
Horizontal Accuracy (DR) 5 m (CEP 50%)
Altitude Accuracy (DR) 5 m (CEP 50%)
Speed Accuracy 0.5 % of Speed
Heading Accuracy <2 degrees
PPS Accuracy, relative to UTC/GPS-Time .<± 25 ns (50%)
DR-TTFF 2 sec
Protocols :
Configurable NMEA or HIPPO binary
Supports proprietary NMEA messages
Interfaces :
All digital inputs and outputs are 3.3 V Low-Voltage TTL compatible
Inputs VIL <0.8 V, VIH > 2.0 V
Outputs VOL <0.4 V, VOH > 2.4 V
UART 38400 Baud, 8 data bits, None parity, 1 stop bit
(default, Baud rate and Parity are configurable)
Odometer 0 kHz–3 kHz, distance of 1 cm–1 m per pulse - Forward/Reverse indicator (Optional)
Antenna Input :
  • Support for active antennas (3.0 V supply, 25 dB LNA gain)
  • For passive or 5.0 V antennas, see application notes in Aardvark manual
Power Supply :
Main Power Supply Voltage 3.0 V to 3.6 V (3.3 V typical)
Power Consumption 200 mW (typical)
Backup Power Supply Voltage

2.5 V to Vcc
Backup Power Consumption 6 µA @ 25 ºC
Antenna Power Supply Voltage Vcc
Environmental Charcateristics
Operating Temperature -40 ºC to +85 ºC
Storage Temperature -40 ºC to +105ºC
Humidity 5% to 95% RH non-condensing @ 60°C
Vibration 5 Hz to 20 Hz: 0.008 g²/Hz
20 Hz to 100 Hz: 0.05 g²/Hz
100 Hz to 900 Hz: –3 dB/octave
Module Dimensions 19 mm x 19 mm x 2.54 mm
  • Antenna – Compact, active, magnetic and non-magnetic antennas suitable for vehicle installations.
  • Evaluation Kit -- the A3000 is an enclosure with an automotive connector for easy vehicle installation and evaluation.

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