GLONASS Central

By: Glonass Central  09-12-2011
Keywords: Gps, tracking

GPS/GLONASS Navigation RECEIVER

The Mode I is system-primary and automatically selected: tracking off all GLONASS satellites in view, free channels track GPS satellites.

Other modes are available upon pilot selection:

  • The Mode II: tracking off all GLONASS satellites in view
  • The Mode III: tracking off all GPS satellites in view. LI frequency, C/A Code GLONASS and GPS, digital processing (WAAS/EGNOS in future)
  • Four-dimensional navigation
  • Expanded digital interfacing capabilities.

The digital receiver computes position, updates ten times a second, measures position to 15 meters RMS, and measures velocity to 0.1 m/s RMS.

Main processing functions, handled by the GL-NDV68E, include:

  • GPS position and velocity sensing
  • The Receiver Autonomous Integrity Monitoring (RAIM), required for Non Precision Approach, Terminal and En Route stages of flight; the Fault Detection and Exclusion Algorithms (FDE) detect and remove erroneous measurements.
  • Providing digital interfacing.

GL-NDV68E can use real-time RTCM differential correction for GLONASS and GPS. Advanced signal-processing techniques, such as Differential GNSS and Kinematics Carrier-Phase Tracking will allow GNSS systems to be certified for Category (CAT) I, II Precision Approaches in the future.

Physical Characteristics

Dimensions

87.6 x 57.2 x 15mm

Connectors

30 pin for digital, MMCX for antenna

Electrical

On-board power supply accepts any unregulated voltage between 6V and 25V

On-board back up battery saves data for about 10 years Typical power consumption is 1.5W

Environmental

Operating

–40 °C to +80 °C

On-board power supply accepts any unregulated voltage between 6V and 25V

Input/Output

Two high speed (115.2 Kbps)standard RS232 Serial Ports

1 PPS output (TTl) synchronized to GPS, UTC, or GlONASS, < 40ns

Accuracy

Velocity

0.1 m/s RMS (steady-rate)

Time

Universal Coordinated Time to the nearest microsecond

Update rate

Up to 10 Hz update rate for real time position & raw data (code and carrier)

Acquisition time

Dynamics

MTBF

Keywords: Gps, tracking