EL-N-2

Dual GNSS/INS navigation system
EL-N-2
Dual-antenna INS/GNSS navigation unit with moving-baseline GNSS heading for static and low-speed heading observability.
EL-N-2 is a compact MEMS INS/GNSS navigation system based on a 3-axis IMU, dual GNSS receiver configuration, DMC (Digital Magnetic Compass) and sensor fusion firmware.
EL-N-2 dual GNSS/INS navigation system
Dual GNSS
Moving baseline GNSS heading support
Heading
GNSS moving-baseline, COG (course over ground) and DMC
RTK
Support for improved positioning accuracy
I/O
USB, RS232, digital inputs and digital output

Installation / Integration

The embedded sensor-fusion firmware processes IMU and dual-GNSS data and outputs real-time PVA data to the host system. The moving-baseline GNSS configuration adds a heading source that is available during static or low-speed operation when the baseline solution is valid. When connected to the CDV software app, data visualization and logging are also available.

Installation

  • Rigid mounting to the host structure
  • User defined device orientation relative to the host frame
  • User defined dual GNSS baseline relative to the host platform
  • Two external GNSS antenna connections
  • Power / data cable connection with the host platform

Host integration

  • Device configuration using CDV software app
  • Data logging for post-test analysis
  • RTK correction input from the host
  • Dual GNSS heading status and baseline diagnostics
  • Integration support through data protocol and example parsing code (C, Python)

Navigation outputs

The CDV software app allows the user to select output content and output data rate. Data is sent to the host platform using proprietary binary protocol.

Data types

  • Attitude: Euler angles, quaternions, DCM
  • Latitude, longitude and altitude
  • Body frame velocity
  • Bias compensated acceleration and angular rate data
  • GNSS position, velocity and timing data
  • Dual GNSS heading and baseline status data

Diagnostic and status data

  • GNSS fix type and RTK status
  • GNSS quality indicators
  • Dual GNSS heading status
  • Navigation status flags
  • Timestamped output for logging

Mechanical dimensions

EL-N-2 mechanical dimensions drawing

Specifications

Attitude accuracy - static 0.05–0.1° (RMS)1
Attitude accuracy - dynamic 0.2–0.4° (RMS)2
GNSS Dual Heading accuracy 0.4° (RMS)3
GNSS (COG) Heading accuracy < 1° (RMS)4
DMC Heading accuracy 2° (RMS)5
Position accuracy - GNSS 1.5 m CEP horizontal / 2.0 m vertical6
Velocity accuracy 0.05 m/s
Output data rate User defined, up to 200 Hz
Serial baud rate Up to 921600 bps
Gyroscope bias stability 8 deg/h
Gyroscope dynamic range ± 2000 °/s
Gyroscope ARW 0.34 °/√hr
Accelerometer range 40 g
IMU data output rate 2 kHz
Supported constellations GPS, GLONASS, Galileo, BeiDou
RTK correction Supported, data provided by the host platform
Communication interface USB, RS232, digital inputs (2x), digital output
Main connector Harwin G125-FV11605L0R
Supply voltage 5 - 36 V
Enclosure Anodized Al enclosure
Dimensions 76.2 x 33 x 41.5 (mm) - L x W x H
Mass 98 g
Operating temperature −40°C to +85°C

Specifications may be updated without prior notice.

1 Valid under stationary or low-dynamic conditions, with proper mounting and low vibration.

2 Valid under good GNSS reception, proper mounting, moderate vibration, and platform dynamics within the defined operating range.

3 Valid for antenna baseline ≥ 1 m under good GNSS reception and valid baseline solution. Longer baselines generally improve heading accuracy.

4 Valid with speed >3 m/s, GNSS fix and low multipath.

5 Valid with hard and soft iron compensation and suitable magnetic environment. Output is referenced to geographic north, by use of embedded WMM model.

6 Standalone GNSS accuracy, dependent on satellite visibility, proper antenna installation and low multipath.

For more information, contact: info@eloptris.rs