Alternative Positioning, Navigation, and Timing Initiative. Leo Eldredge, Manager GNSS FAA Navigation Services Stanford University, California August 2010. Federal Airways – Current. Current Alternative Positioning. ADS-B Surveillance Uses GNSS for primary positioning
Leo Eldredge, Manager GNSS
FAA Navigation Services
Stanford University, California
Jet / Victor Routes
SIDs / STARs, ILS
Q / T Routes
Direct TBO Routes
RNAV SIDs / STARs
Other GNSS ?
DD w/o I ?
* Operational requirements are defined for total system accuracy, which is dominated by fight technical error.
Position accuracy for these operations is negligible.
** Containment for RNP AR is specified as a total system requirement; value representative of current approvals.
Dependent Parallel Approach (DPA)
Independent Parallel Approach (IPA)
Surveillance Integrity Level (SIL)
Navigation Integrity Category (NIC)
Navigation Accuracy Category
for Position (NACp)
1 –Aircraft Transmits ADS-B Signal
6 – Aircraft Uses Own Position for Navigation
5 - TIS-B Sends
Position to Aircraft
Combined DME/GBT Network
2 - WAM Receives Signal
3 - Aircraft Position Determined
4 - Aircraft Position Sent to GBT’s
FIS-BTIS-B with MLAT
Concept to use TIS-B to provide ADS-B equipped aircraft with backup positioning for navigation using MLAT
Communication Coverage: Not Navigation
Research and Systems Analysis
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