The Aircraft Data That Solves Many Mysteries

Introduction

For an automated instrumented UFO or UAP detector, one of the most effective ways to reduce false alerts is to ask a simple question before treating an object as anomalous: does it match a known aircraft? Automatic Dependent Surveillance–Broadcast (ADS-B) data provides a real-time stream of aircraft positions, altitudes, speeds and identifiers transmitted by many aircraft. By comparing camera detections against these broadcasts, a monitoring system can immediately explain a large fraction of otherwise mysterious lights, thermal targets and moving points in the sky. ADS-B therefore acts as a filtering layer that removes routine air traffic from the pool of unknowns, allowing attention to focus on genuinely unexplained observations. FAA documentation describes ADS-B as a system that broadcasts an aircraft’s GPS-derived position, altitude and other flight information, often updating once per second. [Federal Aviation Administration]faa.govFederal Aviation Administration Automatic Dependent Surveillancemore…

Within a multi-sensor detection architecture, ADS-B is valuable not because it proves what every object is, but because it reliably identifies many objects that would otherwise generate unnecessary UAP alerts. It also provides a source of known moving targets that can be used to calibrate cameras and verify system performance. [MDPI]mdpi.comThe ADS-B…

What ADS-B Can Confirm

An automated sky-monitoring system typically begins with a camera or infrared sensor detecting a moving object. Without additional information, the software knows only that something crossed part of the field of view. ADS-B adds context.

When an aircraft broadcasts ADS-B data, the detector can compare the reported aircraft position with the observed direction of the target. If the predicted position and observed track align within expected error margins, the event can be classified as routine air traffic rather than an unidentified object. FAA descriptions of ADS-B note that broadcasts include position, altitude, velocity and identification information, providing precisely the metadata needed for such matching. [Federal Aviation Administration+2Federal Aviation Administration]faa.govFederal Aviation Administration Automatic Dependent Surveillancemore…

This is particularly important at night. Many apparent UAP reports consist of isolated lights with little visible structure. A distant airliner approaching the observer can appear nearly stationary for extended periods while its landing lights remain visible. Without aircraft data, such behaviour can seem unusual. With ADS-B, the detector can immediately recognise the object as a known flight following a documented trajectory.

Modern open aircraft-tracking networks provide additional coverage through multilateration (MLAT), which estimates aircraft positions from timing measurements collected by multiple receivers. This helps identify some aircraft that do not transmit complete positional ADS-B information. [ADS-B Exchange+2ADSB Exchange]adsbexchange.comADS-B ExchangeOpen Source Softwaremlat-client – forwards Mode S messages to a server that resolves the transmitter position by multilater…

In practice, many automated detection pipelines use ADS-B as an exclusion database. The goal is not to prove that an observation is extraordinary; it is to eliminate ordinary explanations first.

Why Missing ADS-B Is Not Proof

One of the most common mistakes in UAP analysis is assuming that an object lacking an ADS-B match must therefore be anomalous. That conclusion does not follow.

ADS-B coverage is extensive but not universal. Some aircraft operate outside mandatory ADS-B airspace. Coverage can vary with geography, receiver density and altitude. Aircraft tracking networks depend on ground receivers, and reception gaps still exist in some regions. [Federal Aviation Administration]faa.govADS-R coverage is available wherever an ADS-B Out and ADS-B In-equipped aircraft…Read more…

Military and government aircraft may also operate with limited public visibility. Discussions within the aircraft-tracking community note that military aircraft are sometimes observed with transponders disabled, while public reporting and regulatory documents show that certain sensitive operations can occur without normal public ADS-B visibility. [Reddit+2NBAA]reddit.comreasons we door dontsee military aircraftReasons we do—or don't—see military aircraft: r/ADSBFebruary 10, 2022 — It seems like American military planes are generally ADS-B…Published: February 10, 2022

Privacy programmes create another complication. Aircraft operators can use mechanisms that make public identification more difficult even when broadcasts continue. [Federal Aviation Administration+2Honeywell Aerospace]faa.govFederal Aviation AdministrationADS-B Privacy22 Mar 2025 — The FAA acknowledges the desire of some operators to limit the availability of…

There are also technical limitations. ADS-B signals can be affected by reception failures, interference or data dropouts. Research into aviation and unmanned-aircraft safety has highlighted risks associated with erroneous, missing or manipulated ADS-B data. [Assure]assureuas.orgAssure GPS & ADS-B Risks for UAS (A44_A11L.UA S.86AssureGPS & ADS-B Risks for UAS (A44_A11L.UAS.86) - AssureErroneous, spoofed, jammed, or drop outs of “ADSB-In” data may result in automa…

For an automated UAP detector, the correct logic is therefore:

Treating every non-match as a UAP would simply replace one source of false positives with another.

Calibration With Known Aircraft Tracks

ADS-B does more than identify aircraft. It also helps calibrate the detector itself.

A recurring challenge in automated sky observation is determining exactly where a camera is pointing and whether that alignment has changed over time. Even a small shift in camera orientation can distort trajectory estimates and create misleading measurements.

Known aircraft provide an elegant solution. Because ADS-B broadcasts include accurate aircraft positions, software can predict where an aircraft should appear in an image. By comparing predicted and observed locations, the system can refine camera orientation, lens geometry and pointing accuracy.

This approach has moved beyond theory into operational research. The Galileo Project’s all-sky infrared observatory has reported using aircraft ADS-B positions as part of a calibration process for its infrared camera array. Researchers describe a calibration method that translates aircraft GPS coordinates from ADS-B broadcasts into expected image coordinates, allowing camera alignment and performance verification against real-world targets. [arXiv+2ResearchGate]arxiv.orgOpen source on arxiv.org.

The advantage is significant. Instead of relying only on laboratory calibration, the observatory continuously checks itself against known objects moving through the actual sky being monitored. Aircraft become calibration references that are available every day and under a wide range of observing conditions. [MDPI+2arXiv]mdpi.comThe ADS-B…

A Practical Filtering Workflow

In a mature automated detector, ADS-B data is usually integrated near the beginning of the classification pipeline.

A typical sequence is:

This workflow dramatically reduces the number of events requiring human review. Instead of analysts examining thousands of ordinary aircraft observations, the software removes most routine traffic automatically and preserves attention for genuinely unusual detections.

Open ADS-B receiver networks and low-cost software-defined radio hardware have made this approach accessible to citizen-science observatories as well as professional projects. Aircraft broadcasts can be collected locally and synchronised with camera timestamps, producing a much richer record than video alone. [FlightAware+2ADS-B Exchange]uk.flightaware.comFlight Aware Pi AwarePiAware - ADS-B and MLAT ReceiverFlightAware has created an open source software solution called PiAware to make aircraft data…

The Real Value of ADS-B in UAP Detection

The greatest contribution of ADS-B is not that it identifies every object. Its value is that it removes a large category of ordinary explanations before they become mysteries.

In a sky already crowded with commercial flights, private aircraft, helicopters and other traffic, a detector that ignores aircraft data will continuously generate misleading alerts. A detector that incorporates ADS-B starts from a stronger position: it can recognise known traffic, measure its own accuracy using known aircraft tracks, and reserve the label “unidentified” for cases that remain unexplained after routine checks.

That distinction is fundamental to credible automated UAP detection. The objective is not to maximise the number of unknowns. It is to minimise preventable mistakes. ADS-B is one of the most effective tools available for doing exactly that. arXiv+3Federal Aviation Administration+3Federal Aviation Administration [faa.gov]faa.govFederal Aviation Administration Automatic Dependent Surveillancemore…

Amazon book picks

Further Reading

Books and field guides related to The Aircraft Data That Solves Many Mysteries. Use these as the next step if you want deeper reading beyond the article.

Book

Skunk Works

By Ben R. Rich, Leo Janos

Provides useful context on aircraft development, flight testing, and the realities behind unusual aerial observations.

See on Amazon

Book

UFOs

By Leslie Kean

Discusses the importance of reliable aviation data, radar, and corroborated observations when evaluating unexplained aerial events.

See on Amazon

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Radar Principles for the Non-Specialist

By John C. Toomay

Helps readers understand how sensors distinguish known aircraft from anomalous targets.

See on Amazon

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The Hobbyist's Guide to the RTL-SDR

By Mr. Carl Laufer

First published 2015.

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Browse more on Amazon: Skunk Works UFOs Radar Principles for the Non Specialist

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Endnotes

1. Source: faa.gov
   Title: Federal Aviation Administration Automatic Dependent Surveillance
   Link: https://www.faa.gov/about/office_org/headquarters_offices/avs/offices/afx/afs/afs400/afs410/ads-b
   Source snippet

   more...

2. Source: faa.gov
   Title: ins outs
   Link: https://www.faa.gov/air_traffic/technology/equipadsb/capabilities/ins_outs
   Source snippet

   Federal Aviation AdministrationIns and Outs7 Feb 2023 — ADS-B Out works by broadcasting information about an aircraft's GPS location, alt...

3. Source: mdpi.com
   Link: https://www.mdpi.com/1424-8220/25/3/783
   Source snippet

   The ADS-B...

4. Source: arxiv.org
   Link: https://arxiv.org/abs/2411.07956

5. Source: faa.gov
   Link: https://www.faa.gov/air_traffic/technology/equipadsb/resources/faq
   Source snippet

   ADS-R coverage is available wherever an ADS-B Out and ADS-B In-equipped aircraft...Read more...

6. Source: arxiv.org
   Title: arXiv Towards Security-Optimized Placement of ADS-B Sensors
   Link: https://arxiv.org/abs/2204.01994

7. Source: reddit.com
   Title: reasons we door dontsee military aircraft
   Link: https://www.reddit.com/r/ADSB/comments/sp0id2/reasons_we_door_dontsee_military_aircraft/
   Source snippet

   Reasons we do—or don't—see military aircraft: r/ADSBFebruary 10, 2022 — It seems like American military planes are generally ADS-B...

   Published: February 10, 2022

8. Source: nbaa.org
   Link: https://nbaa.org/aircraft-operations/communications-navigation-surveillance-cns/ads-b/faa-permits-ads-b-off-military-sensitive-flights/
   Source snippet

   Aircraft accessing RVSM airspace are required to verify altitude-keeping performance for...Read more...

9. Source: faa.gov
   Link: https://www.faa.gov/air_traffic/technology/equipadsb/privacy
   Source snippet

   Federal Aviation AdministrationADS-B Privacy22 Mar 2025 — The FAA acknowledges the desire of some operators to limit the availability of...

10. Source: aerospace.honeywell.com
    Title: Aerospace ADS-B Privacy
    Link: https://aerospace.honeywell.com/us/en/about-us/news/2020/11/ads-b-privacy
    Source snippet

    more...

11. Source: arxiv.org
    Title: arXiv Ontology-Based Anomaly Detection for Air Traffic Control Systems
    Link: https://arxiv.org/abs/2207.00637

12. Source: researchgate.net
    Link: https://www.researchgate.net/publication/388466760_Commissioning_an_All-Sky_Infrared_Camera_Array_for_Detection_of_Airborne_Objects
    Source snippet

    (PDF) Commissioning an All-Sky Infrared Camera Array for...10 Jan 2025 — In addition to performing intrinsic and thermal calibrations, w...

13. Source: uk.flightaware.com
    Title: Flight Aware Pi Aware
    Link: https://uk.flightaware.com/adsb/piaware/
    Source snippet

    PiAware - ADS-B and MLAT ReceiverFlightAware has created an [open source]({{ 'open-source/' | relative_url }}) software solution called PiAware to make aircraft data...

14. Source: faa.gov
    Link: https://www.faa.gov/air_traffic/technology/adsb/faq
    Source snippet

    ADS-B FAQ3 Mar 2025 — ADS-B reduces the risk of runway incursions with cockpit and controller displays that show the location of aircraft...

15. Source: faa.gov
    Link: https://www.faa.gov/air_traffic/technology/equipadsb/research/airspace
    Source snippet

    5 Mar 2025 — For aircraft operating below 18,000 feet and within the United States ADS-B rule airspace, you must be equipped with either...

16. Source: nbaa.org
    Link: https://nbaa.org/aircraft-operations/security/privacy/ads-b-privacy-faq/
    Source snippet

    ADS-B Privacy FAQTo unblock your FAA flight data, submit a “No Blocking/Unblocking” request to remove any data limits previously requeste...

17. Source: nbaa.org
    Link: https://nbaa.org/aircraft-operations/security/privacy/limiting-aircraft-data-displayed-ladd/
    Source snippet

    y and security concerns with the availability of ADS-B Out...Read more...

18. Source: adsb.cool
    Title: A curated list of awesome ADS-B resources
    Link: https://adsb.cool/
    Source snippet

    A curated list of...ADSB.lol - A completely open-source and community-driven flight tracker that displays and provides ODbL-licensed d...

19. Source: adsbexchange.com
    Link: https://www.adsbexchange.com/open-source-software/
    Source snippet

    ADS-B ExchangeOpen Source Softwaremlat-client – forwards Mode S messages to a server that resolves the transmitter position by multilater...

20. Source: adsbx.discourse.group
    Title: ADSB Exchange Multilateration (MLAT)
    Link: https://adsbx.discourse.group/t/multilateration-mlat-how-it-works-and-why-you-should-care/325
    Source snippet

    Multilateration (MLAT) - How it Works, and Why You Should...15 Feb 2024 — Multilateration (MLAT) is an essential technology for tracking...

21. Source: assureuas.org
    Title: Assure GPS & ADS-B Risks for UAS (A44_A11L.UA S.86)
    Link: https://www.assureuas.org/projects/gps-ads-b-risks-for-uas/
    Source snippet

    AssureGPS & ADS-B Risks for UAS (A44_A11L.UAS.86) - AssureErroneous, spoofed, jammed, or drop outs of “ADSB-In” data may result in automa...

22. Source: adsbexchange.com
    Link: https://www.adsbexchange.com/
    Source snippet

    ADS-B ExchangeA global, independent flight data network. ADS-B Exchange connects the world's largest independent ADS-B receiver network...

23. Source: ui.adsabs.harvard.edu
    Link: https://ui.adsabs.harvard.edu/abs/arXiv%3A2411.07956
    Source snippet

    an All-Sky Infrared Camera Array for...In addition to performing intrinsic and thermal calibrations, we implement a novel extrinsic cali...

24. Source: Wikipedia
    Title: Automatic Dependent Surveillance–Broadcast
    Link: https://en.wikipedia.org/wiki/Automatic_Dependent_Surveillance%E2%80%93Broadcast
    Source snippet

    Automatic Dependent Surveillance–BroadcastADS-B is "automatic" in that it requires no pilot or external input to trigger its transmiss...

Additional References

1. Source: mode-s.org
   Link: https://mode-s.org/atmdata/sources/
   Source snippet

   Data sourcesSurveillance data, ADS-B, Mode S · The OpenSky Network (live API) allows you to obtain live flight data over the world for fr...

2. Source: reuters.com
   Link: https://www.reuters.com/world/us/key-safety-system-off-army-helicopter-that-collided-with-american-airlines-jet-2025-02-06/
   Source snippet

   Army Black Hawk helicopter involved in a collision with an American Airlines regional jet near Washington's Reagan Airport had turned off...

3. Source: raspberrypi.com
   Link: https://www.raspberrypi.com/tutorials/build-your-own-raspberry-pi-flight-tracker/
   Source snippet

   Build your own Raspberry Pi flight trackerReceive signals from aircraft transponders and track flights with a Raspberry Pi 3 A+ and a low...

4. Source: avi-loeb.medium.com
   Link: https://avi-loeb.medium.com/commissioning-data-on-half-a-million-objects-in-the-sky-from-the-galileo-project-observatory-are-a23bd084233a
   Source snippet

   Data on Half a Million Objects in the Sky from...Airplane positions from Automatic Dependent Surveillance–Broadcast (ADS-B) data was col...

5. Source: uavionix.com
   Link: https://uavionix.com/blog/harnessing-the-shifting-landscape-of-ads-b-equipage-opportunities-for-electronic-conspicuity-and-uas/?srsltid=AfmBOoocJZVTw4lh_LRxAMbTsEl64x9Ars_V6sHsht_9ffYxYbSrF-Ef
   Source snippet

   Harnessing the Shifting Landscape of ADS-B Equipage17 Jun 2025 — ADS-B Out can be transmitted on two frequencies: 1090 MHz Extended Squit...

6. Source: sgf.rgo.ac.uk
   Link: https://sgf.rgo.ac.uk/operations/adsb.html
   Source snippet

   rgo.ac.ukADS-B technology informs the SGF in-sky aircraft safety systemAircraft transmit real-time updates of their positions and velocit...

7. Source: txtav.com
   Link: https://txtav.com/en/journey/articles/articles/adsb-out-explained
   Source snippet

   ADS-B Out ExplainedADS-B allows equipped aircraft and ground vehicles to broadcast their identification, position, altitude and velocity...

8. Source: facebook.com
   Link: https://www.facebook.com/flightradar24/posts/gps-interference-can-cause-ads-b-equipped-aircraft-to-send-incorrect-position-da/1234765592023890/
   Source snippet

   GPS interference can cause ADS-B-equipped aircraft to...ADS-B is a surveillance technology in which an aircraft determines its position...

9. Source: youtube.com
   Link: https://www.youtube.com/watch?v=cKrW0aoB_6w
   Source snippet

   ADS-B: The Future of Aircraft Surveillance! Explained by...ADSB is an advanced surveillance technology that allows aircraft to broadcast...

10. Source: aopa.org
    Link: https://www.aopa.org/go-fly/aircraft-and-ownership/ads-b
    Source snippet

    r traffic controllers. It's also transmitted to aircraft...Read more...