Alternative Positioning, Navigation and Timing Using Multilateration in a Terminal Control Area

Wide Area Multilateration report

Techniques to Provide Resilient Alternative Positioning, Navigation, and Timing (APNT) Using Automatic Dependent Surveillance - Broadcast (ADS-B) Ground Stations

The United States Federal Aviation Administration (FAA) Alternative Positioning, Navigation, and Timing (APNT) program is examining the use of existing FAA terrestrial infrastructure to provide navigation capable of continuing US National Airspace System (NAS) operations should Global Navigation Satellite System (GNSS) position, navigation, and timing (PNT) services be unavailable. The approxim...

Precision Position, Navigation, and Timing without the Global Positioning System

Time Source Options for Alternate Positioning Navigation and Timing (APNT)

Precise time synchronization is an essential element for APNT technologies, such as wide area multilateration (WAM) and passive pseudo-ranging. The goal is to provide a time service/source that allows APNT technologies to support a required navigation performance 0.3 (RNP 0.3) and provides the navigation integrity and accuracy for surveillance systems that is required for three-mile aircraft se...

Pseudolite Alternatives for Alternate Positioning, Navigation, and Timing (APNT)

The Federal Aviation Administration (FAA) has initiated an APNT program to research various alternative strategies that will ensure that the PNT services necessary to safely, securely, and efficiently support the US National Airspace Systems’ (NAS) transition to the Next Generation Air Transportation System (NextGen) will be ensured. This paper discusses the Pseudolite Alternative, one of a num...