Characterization and Mitigation of Multipath for Terrestrial based Aviation Radionavigation

Schneckenburger, Nicolas; Fiebig, U.-C.; Lo, Sherman; Enge, Per; Lilley, R. W.

doi:10.1002/navi.235

Cited by 1 publication

(2 citation statements)

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“…While ADS‐B was designed and deployed to support the Air Traffic Control (ATC) surveillance functionality, ADS‐B infrastructure can provide accuracy, continuity, integrity, and coverage benefits for navigation and timing. Like other APNT possibilities being studied for aviation, such as DME and L‐Band Digital Aviation Communications (L‐DACS) (Schneckenburger et al., 2013, 2018), it operates at around 1000 MHz and in an Aeronautical Radio Navigation Service (ARNS) band that is protected for aviation use. A benefit of using ADS‐B is to help support navigation in airport terminal areas, where aircraft are closer to the ground and fewer terrestrial stations are available due to LOS limitations.…”

Section: Ads‐b Uat Backgroundmentioning

confidence: 99%

“…By combining DME and ADS‐B ranges, we get signals from more transmitter locations, which helps improve low‐altitude coverage. Finally, even though the FAA's APNT efforts have been superseded by other GNSS resiliency efforts, there is continued interest around the world in APNT (Jheng, et al., 2020; Kim & Kee, 2019; Schneckenburger, et al., 2018). The concepts that were developed are useful to support other airspace needs, such as providing robust time and helping to comply with federal policy to ensure the resiliency of PNT services (Executive Office of the President, 2020; White House Administrative Office, 2004).…”

Section: Introductionmentioning

confidence: 99%

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Automatic Dependent Surveillance‐Broadcast (ADS‐B) Universal Access Transceiver (UAT) transmissions for Alternative Positioning, Navigation, and Timing (APNT): Concept & practice

Chen

2021

Navigation

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The vulnerability of Positioning, Navigation, and Timing (PNT) services derived from Global Navigation Satellite Systems (GNSS) makes having a resilient and accurate Alternative PNT (APNT) based on high‐power terrestrial radio sources necessary. The L‐band is very crowded spectral real estate with GNSS, Distance Measuring Equipment (DME) and Air Traffic Control Beacon System (ATCRBS) signals occupying the band from 900–1600 MHz. Thus, as getting new signal and spectrum for APNT would be difficult, we must leverage existing transmissions and infrastructure. The ∼660 Automatic Dependent Surveillance‐Broadcast (ADS‐B) ground stations in the United States represent significant infrastructure that can be leveraged for APNT. However, as ADS‐B was designed for surveillance, it does not inherently possess features necessary to support APNT goals. This paper describes and demonstrates techniques for using ADS‐B Universal Access Transceiver (UAT) signals for PNT. We develop methods to use all ground UAT signals to provide robust, multi‐frequency pseudoranges. We examine the ranging and positioning performance of the UAT signal on the ground and in flight, to demonstrate its ranging accuracy, and hence the timing and synchronization of the station. We demonstrate and analyze navigation using UAT signals, as well as the intra‐system interference challenges of using multiple UAT stations.

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Section: Ads‐b Uat Backgroundmentioning

confidence: 99%