02/23/2009
GPS Raim Prediction Information
What is RAIM?
RAIM stands for Receiver Autonomous Integrity Monitoring (RAIM)

What flights require a GPS RAIM Prediction analysis ?
GPS RAIM Predication requirements apply to any flight using U.S. RNAV routes (Q routes and Tango routes), RNAV Departure Procedures (Obstacle Departure Procedures and Standard Instrument Departures), RNAV Standard Terminal Arrivals (STARs), GPS NPA (non-precision approaches using GPS), and Alternate Aiport (if using GPS).

When will a pre-flight GPS RAIM Prediction analysis be required by the FAA?
Starting July 1st 2009, GPS RAIM availability must be confirmed for the intended route of flight (route and time) using current GPS satellite information.

How can I check pre-flight GPS RAIM Prediction on FltPlan.com?
If the equipment entered in your aircraft profile indicates that you have GPS equipment, FltPlan.com will automatically calculate your flight plan for GPS RAIM along your route of flight (both route and time) using current GPS satellite information.
We will automatically display on the bottom left side of the NavLog (Navigational Log), one of the icon below.

Good
No GPS outages that will effect your flight
Warning
GPS outage within 1 hour window of your flight
Caution
GPS outage within 2 hour window of your flight


How far in advance can I check pre-flight GPS RAIM Prediction.
GPS satellite information is available no more that 50 hours in advance.
FltPlan.com will automatically calculate your flight plan for GPS RAIM for any NavLogs displayed for the current day, or the following day.
GPS RAIM Prediction will not be calculated, nor displayed, for any flight plan more than two days in the future.

What does FltPlan.com's GPS RAIM Prediction check?
In addition to your route of flight, FltPlan.com checks for Terminal Departure RAIM, Terminal Arrival RAIM, Arrival Airport NPA (non-precision Approach) RAIM, and Alternate Airport RAIM (if you have listed an alternate).

What if I have "Baro-Aiding"?
If you get a Caution or Warning GPS RAIM message on your NavLog, you can click on the image and get a full report,and also see if you have a legal GPS RAIM check with Baro-aiding, you will get the following message:
If you have BARO AIDING, your flight is NOT affected.


Can I get more information about my flight and any possible GPS outages?
Yes, you can click on the GPS RAIM icon and get a full graphical report.(see below)

Additional Information
  • FltPlan.com provides an easy method to verify that you flight complies with AC-90-100A for each flight.
  • FltPlan.com's RAIM Prediction complies with FAA requirement for preflight planning.
  • On the bottom left side of the Navigation Log, a message will automatically be displayed for GPS aircraft (based on your aircraft equipment profile).
  • In addition to the GPS RAIM Prediction message, you can also get a full graphical report by clicking on the message.
  • If needed for documentation, you can confirm the check by printing the NavLog, or Printing the full report.
  • As we approach July 1st, we will be providing more details and information on use of our GPS RAIM Prediction functions.




    • Sample screen shot of GPS RAIM Predication Warning:

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