AUGUR

AUGUR is a web-based tool which checks the availability of GPS integrity (RAIM) for different operations including terminal area and final approach operations.

AUGUR allows users to predict operations in the following areas:

  • “terminal” area where GPS-based RNAV 1 (including P-RNAV) or RNP 1 procedures are published and
  • final “approach” for airports where RNP APCH procedures to LNAV and LNAV/VNAV minima are published

This keeps airspace users informed about the number of operational satellites and provides a way to confirm GPS positioning availability and integrity for an intended flight.

AUGUR is developed by EUROCONTROL to meet the following requirements:

  • Sub-section 10.2.1.3 (Pre-flight Planning) of JAA TGL 10 (Airworthiness And Operational Approval For Precision RNAV Operations In Designated European Airspace), which states:

If a stand-alone GPS is to be used for P-RNAV, the availability of RAIM must be confirmed with account taken of the latest information from the US Coastguard giving details of satellite non-availability.

Note: RAIM prediction may be a function of the equipment provided that satellite non-availability data can be entered. In the absence of such a function, an airspace service provider may offer an approved RAIM availability service to users.

  • Sub-section 10.2.1.3 (Pre-flight Planning) of JAA TGL 10 (Airworthiness And Operational Approval For Precision RNAV Operations In Designated European Airspace), which states:

If a stand-alone GPS is to be used for P-RNAV, the availability of RAIM must be confirmed with account taken of the latest information from the US Coastguard giving details of satellite non-availability.

Note: RAIM prediction may be a function of the equipment provided that satellite non-availability data can be entered. In the absence of such a function, an airspace service provider may offer an approved RAIM availability service to users.

  • Sub-section 1.1.f (Pre-flight planning) of Appendix 4 (Operational Procedures) to EASA AMC 20-27 (Airworthiness Approval and Operational Criteria for RNP APPROACH (RNP APCH) Operations Including APV BARO-VNAV Operations) states:

For those GNSS systems relying on RAIM, its availability 15 min before Estimated Time of Arrival (ETA) until 15 min after ETA should be verified during the preflight planning. In the event of a predicted continuous loss of fault detection of more than five (5) minutes, the flight planning should be revised (e.g. delaying the departure or planning a different approach procedure).

Note: For certain systems, prediction is not systematic but is only required in specific cases and shall be detailed in the relevant section of the AFM. In addition, RAIM availability prediction services may be provided to users by the air navigation service provider (ANSP), an avionics manufacturer or other entities.

AUGUR also supports GPS RAIM NOTAM services by national NOTAM offices providing GPS RAIM NOTAM proposals containing GPS RAIM unavailability period for RNP APCH to LNAV and LNAV/VNAV minima. Requests for such a service should be made via the EAD service desk.

For questions please contact the AUGUR team.

Finally, AUGUR provides the number of satellites in the GPS constellation and any outages planned in the coming 72 hours (based on NANUs).

Access

AUGUR is freely accessible. Please use either of the buttons below to access the web-based tool.

ACCESS AUGUR

Navigation Unit

Contact us for any questions, comments or feedback on  AUGUR, FAS DB, MET and PBN Approach Map tools.

EAD Service Desk

The service desk provides technical assistance to EAD clients 24/7.