Within Multi Sensor
What Heat Cameras Reveal and Distort
Infrared cameras can reveal heat and night-time motion, but blooming, gain and exhaust plumes can distort what the target appears to be.
On this page
- Why infrared helps at night
- Common infrared image traps
- Calibrating infrared tracks against known aircraft
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Introduction
Infrared cameras are one of the most valuable additions to an automated night-time UAP detection system because they can record thermal contrast when ordinary visible-light cameras struggle. A heat-sensitive camera may detect an aircraft engine, a satellite flare, a warm bird, or another aerial object even when the sky appears visually dark. However, infrared imagery also creates its own interpretation problems. Bright thermal sources can bloom, exhaust plumes can appear larger than the vehicle producing them, and automatic gain settings can make ordinary objects look unusual. For that reason, infrared footage is strongest when it is treated as one calibrated measurement within a multi-sensor system rather than as stand-alone proof of extraordinary behaviour. NASA’s UAP study and several recent scientific observatory projects have repeatedly emphasised calibration, metadata and cross-checking against independent measurements as essential requirements for reliable analysis. [NASA Science+2NASA]science.nasa.govNASA ScienceIndependent Study Team ReportIndeed, several apparent UAP have been demonstrated to be sensor artifacts once appropriate cali…
Why Infrared Helps at Night
Visible-light cameras depend on reflected light. At night, many objects become difficult to detect unless they carry navigation lights or are illuminated by the Moon, cities, or other light sources. Infrared systems instead measure emitted or reflected radiation in infrared wavelengths, allowing them to detect temperature differences that may remain visible even in darkness. Thermal imaging systems are widely used in aviation, surveillance and scientific observation because they can reveal warm objects against cooler backgrounds and often operate effectively under conditions that challenge ordinary cameras. [Wikipedia]WikipediaForward-looking infraredForward-looking infrared
For automated UAP detection, infrared imagery provides several specific advantages:
- Night-time tracking: Objects that are nearly invisible in visible light may still produce detectable thermal signatures.
- Thermal discrimination: A hot engine, exhaust plume or heated airframe may be distinguishable from a colder background sky.
- Continuous monitoring: Infrared cameras can operate throughout the night without depending on artificial illumination.
- Cross-validation: When an object appears simultaneously in visible and infrared channels, analysts gain more information than either sensor could provide alone. [Wikipedia]WikipediaForward-looking infraredForward-looking infrared
This is one reason scientific UAP observatories increasingly include thermal sensors alongside optical cameras. The Galileo Project’s observatory design combines infrared, optical, radio and other measurements specifically to build a more complete record of aerial activity rather than relying on a single imaging channel. [arXiv]arxiv.orgOpen source on arxiv.org.
A practical example comes from the Galileo Project’s all-sky infrared array, which uses eight long-wave infrared cameras and synchronises them with aircraft position data from Automatic Dependent Surveillance–Broadcast (ADS-B) transmissions. The goal is not merely to record unusual-looking thermal targets, but to determine how known aircraft appear in infrared imagery under real operating conditions. [ADS Abstract Service+2MDPI]ui.adsabs.harvard.eduIn addition to performing…
Common Infrared Image Traps
The persuasive appearance of thermal imagery often exceeds what the underlying data can actually support. Several well-known effects can make an ordinary target appear more exotic than it is.
Blooming and Saturation
Infrared detectors have limits. When a source is significantly brighter than the surrounding scene, its energy can spread beyond the true size of the object in the image. This blooming or saturation effect may cause a point-like heat source to appear as a larger structured object.
The result is that apparent shape may not correspond to physical shape. A bright aircraft engine or hot exhaust region can create a thermal image much larger than the aircraft itself. Discussions of FLIR imagery frequently focus on this issue because observers often interpret the apparent outline as the actual craft rather than as a sensor response. NASA’s UAP study specifically noted that some apparent UAP cases have later proved to be sensor artefacts once calibration and metadata were examined. [NASA Science]science.nasa.govNASA ScienceIndependent Study Team ReportIndeed, several apparent UAP have been demonstrated to be sensor artifacts once appropriate cali…
Automatic Gain Effects
Many infrared cameras continuously adjust image contrast to keep scenes visible. This automatic gain control can dramatically alter how an object appears over time.
A target entering a darker background may suddenly seem brighter or larger despite no change in the object itself. Likewise, a thermal source can appear to pulse or fluctuate because the camera is adjusting display settings rather than because the target is changing behaviour. Such effects are common in operational infrared systems and can complicate interpretation of short clips lacking metadata. [NASA Science]science.nasa.govNASA ScienceIndependent Study Team ReportIndeed, several apparent UAP have been demonstrated to be sensor artifacts once appropriate cali…
Exhaust Plumes Can Dominate the Image
Aircraft are often more visible in infrared because of their engines than because of their physical structure. Infrared specialists routinely use thermal cameras to study exhaust plumes, combustion processes and propulsion signatures. These plumes may extend well beyond the dimensions of the aircraft and can become the dominant feature seen by the sensor. [FLIR]flir.comPlumes and PropulsionExhaust plumes are a prominent source of infrared radiation signatures in flight vehicles. thermal imaging camer…
In practical terms, a detector may be tracking a plume rather than the aircraft body. Depending on viewing angle, atmospheric conditions and infrared wavelength, the apparent thermal target may look elongated, asymmetric or unexpectedly large. Research on infrared plume modelling similarly shows that camera position, field of view and imaging parameters can substantially change the appearance of a thermal plume. [MECS Press]mecs-press.orgMECS PressA Preliminary Model of Infrared Image Generation for…June 20, 2011 — by F Mei · 2011 · Cited by 14 — Infrared image of the e…
Temperature Is Not Always What It Seems
Thermal images are not direct photographs of temperature. They represent infrared radiation reaching the detector, which depends on factors including emissivity, atmospheric transmission and sensor characteristics.
A material with low emissivity may appear cooler than its actual temperature, while reflective surfaces can display infrared radiation originating elsewhere. In thermal imaging, a recorded brightness pattern does not automatically reveal the true temperature or composition of an object. [FLIR]flir.comHow Does Emissivity Affect Thermal Imaging?How Does Emissivity Affect Thermal Imaging?November 1, 2021 — 1 Nov 2021 — Emissivity is a measure of how efficiently an object radia…
Calibrating Infrared Tracks Against Known Aircraft
The most reliable way to understand infrared UAP observations is to compare them with targets whose identity is already known.
A central lesson emerging from modern UAP studies is that calibration data are at least as important as anomaly data. Before analysts can judge whether a thermal signature is unusual, they must know how ordinary aircraft, helicopters, satellites, birds and atmospheric phenomena appear to the specific camera system being used. NASA’s independent study repeatedly highlighted poor calibration, missing metadata and insufficient sensor characterisation as major obstacles to meaningful analysis. [NASA Science+2Wikisource]science.nasa.govNASA ScienceIndependent Study Team ReportIndeed, several apparent UAP have been demonstrated to be sensor artifacts once appropriate cali…
The Galileo Project’s infrared observatory provides a concrete example. Its calibration process uses synchronised ADS-B aircraft positions to map known aircraft locations into infrared camera images. Researchers can then compare the expected position of a tracked aircraft with the thermal target recorded by the sensor and measure pointing accuracy, distortion and tracking performance. [MDPI+2arXiv]mdpi.comThe ADS-B…
This approach produces several benefits:
- It establishes how normal aircraft appear at different ranges, headings and altitudes.
- It reveals systematic camera errors before they are mistaken for anomalies.
- It provides a baseline library of known thermal signatures.
- It allows apparent anomalies to be tested against independently verified aircraft positions. [MDPI]mdpi.comThe ADS-B…
In a mature automated detection network, an infrared track would ideally be compared against aircraft transponder data, visible-light imagery, weather information and observations from additional sensors. If all channels agree, confidence rises. If only a single infrared image appears unusual, confidence should remain limited until alternative explanations are excluded. [NASA+2Wikisource]nasa.govupdate nasa shares uap independent study report names directorUPDATE: NASA Shares UAP Independent Study Report14 Sept 2023 — We found that NASA can help the whole-of-government UAP effort through…
What Infrared Actually Contributes
Infrared cameras add genuine capability to night-time UAP detection. They extend observing time into darkness, reveal thermal behaviour invisible to ordinary cameras and provide an additional measurement channel that can help distinguish between different classes of aerial objects. Yet infrared imagery is not a shortcut to certainty.
The strongest evidence comes not from dramatic-looking heat images but from calibrated thermal measurements that can be compared against known aircraft, known atmospheric phenomena and independent sensor records. In an automated instrumented UAP detector, infrared is therefore most valuable not as a stand-alone witness, but as one component in a system designed to separate genuine unknowns from the many ways that heat, optics and sensor processing can distort appearances. [arXiv+3NASA Science+3NASA]science.nasa.govNASA ScienceIndependent Study Team ReportIndeed, several apparent UAP have been demonstrated to be sensor artifacts once appropriate cali…
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Endnotes
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Source: science.nasa.gov
Link: https://science.nasa.gov/wp-content/uploads/2023/09/uap-independent-study-team-final-report.pdfSource snippet
NASA ScienceIndependent Study Team ReportIndeed, several apparent UAP have been demonstrated to be sensor artifacts once appropriate cali...
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Source: nasa.gov
Title: update nasa shares uap independent study report names director
Link: https://www.nasa.gov/news-release/update-nasa-shares-uap-independent-study-report-names-director/Source snippet
UPDATE: NASA Shares UAP Independent Study Report14 Sept 2023 — We found that NASA can help the whole-of-government UAP effort through...
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Source: en.wikisource.org
Link: https://en.wikisource.org/wiki/Page%3AUAP_Independent_Study_Team_-_Final_Report.pdf/5Source snippet
Page:UAP Independent Study Team - Final Report.pdf/512 Nov 2023 — At present, analysis of UAP data is hampered by poor sensor c...
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Source: Wikipedia
Title: Forward-looking infrared
Link: https://en.wikipedia.org/wiki/Forward-looking_infrared -
Source: arxiv.org
Link: https://arxiv.org/abs/2305.18566 -
Source: mdpi.com
Link: https://www.mdpi.com/1424-8220/25/3/783Source snippet
The ADS-B...
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Source: arxiv.org
Link: https://arxiv.org/abs/2411.07956Source snippet
Commissioning An All-Sky Infrared Camera Array for...by L Dominé · 2024 · Cited by 11 — The Galileo Project is designing, building, and...
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Source: en.wikisource.org
Title: Responses to Statement of Task
Link: https://en.wikisource.org/wiki/NASA_Unidentified_Anomalous_Phenomena%3A_Independent_Study_Team_Report/Responses_to_Statement_of_TaskSource snippet
Unidentified Anomalous Phenomena: Independent...14 Oct 2023 — Indeed, several apparent UAP have been demonstrated to be sensor artifacts...
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Source: flir.com
Link: https://www.flir.com/en-gb/instruments/science/plumes-and-propulsion/Source snippet
Plumes and PropulsionExhaust plumes are a prominent source of infrared radiation signatures in flight vehicles. thermal imaging camer...
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Source: flir.com
Link: https://www.flir.com/instruments/science/plumes-and-propulsion/Source snippet
Plumes and PropulsionThe ability to filter an infrared camera to specific spectral bands is crucial when evaluating plumes and propulsion...
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Source: mecs-press.org
Link: https://www.mecs-press.org/ijigsp/ijigsp-v3-n4/IJIGSP-V3-N4-7.pdfSource snippet
MECS PressA Preliminary Model of Infrared Image Generation for...June 20, 2011 — by F Mei · 2011 · Cited by 14 — Infrared image of the e...
Published: June 20, 2011
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Source: flir.com
Title: How Does Emissivity Affect Thermal Imaging?
Link: https://www.flir.com/en-gb/discover/professional-tools/how-does-emissivity-affect-thermal-imaging/Source snippet
How Does Emissivity Affect Thermal Imaging?November 1, 2021 — 1 Nov 2021 — Emissivity is a measure of how efficiently an object radia...
Published: November 1, 2021
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Source: arxiv.org
Link: https://arxiv.org/html/2506.00125v1Source snippet
1 Introduction30 May 2025 — A system designed for the comprehensive scientific study of aerial phenomena which integrates multiple sensor...
Published: May 2025
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Source: science.nasa.gov
Link: https://science.nasa.gov/uap/Source snippet
nasa.govUAP9 Jun 2022 — The UAP Independent Study shall report on the following questions: What types of scientific data currently collec...
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Source: Wikipedia
Title: NASA Unidentified Anomalous Phenomena Independent Study Team
Link: https://en.wikipedia.org/wiki/NASA_Unidentified_Anomalous_Phenomena_Independent_Study_TeamSource snippet
NASA Unidentified Anomalous Phenomena Independent...UAPs are defined as phenomena or observations of events in the air, sea, space, a...
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Source: Wikipedia
Title: Pentagon UFO videos
Link: https://en.wikipedia.org/wiki/Pentagon_UFO_videosSource snippet
Pentagon UFO videosThe Pentagon UFO videos are selected visual recordings of Forward-looking infrared (FLIR) targeting cameras from Un...
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Source: ui.adsabs.harvard.edu
Link: https://ui.adsabs.harvard.edu/abs/arXiv%3A2411.07956Source snippet
In addition to performing...
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Source: flirmedia.com
Title: Flir Media THE ULTIMATE INFRARED HANDBOOK FOR R&D
Link: https://www.flirmedia.com/MMC/THG/Brochures/T559243/T559243_EN.pdfSource snippet
FLIRThermographic imaging is accomplished with a camera that converts infrared radiation (IR) into a visual image that depicts temperatur...
Additional References
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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-a23bd084233aSource snippet
Data on Half a Million Objects in the Sky from...A collection of sensors in the Galileo Project Observatory at Harvard University monito...
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Source: rapid-tech.com.au
Link: https://rapid-tech.com.au/wp-content/uploads/2018/10/Flir-Thermography-Primer.pdfSource snippet
Thermography is the technique for producing an image of invisible (to our eyes) infrared light emitted by objects due to their thermal co...
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Source: infratec.co.uk
Link: https://www.infratec.co.uk/thermography/industries-applications/aerial-thermography/Source snippet
Infrared cameras for aerial thermographyInfrared cameras allow for quick extensive overviews in airborne thermography. Inform yourself ab...
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Source: studocu.com
Link: https://www.studocu.com/en-us/document/harvard-medical-school/estadistica/nasa-uap-independent-study-team-final-report-key-findings-and-recommendations/157385671Source snippet
NASA UAP Independent Study Team Final ReportAt present, analysis of UAP data is hampered by poor sensor calibration, the. lack of multipl...
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Source: medium.com
Link: https://medium.com/%40omarvferro/seriously-are-all-those-blurry-dots-in-infrared-cameras-and-distant-lights-in-the-sky-the-best-8d59e3e75f74Source snippet
Seriously, Are All Those Blurry Dots in Infrared Cameras...NASA UAP Report Analysis: Evaluating Extraterrestrial Evidence, Infrared Sens...
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Source: airborne.geog.kcl.ac.uk
Link: https://airborne.geog.kcl.ac.uk/infratec/Source snippet
Thermal ImagersThe Infratec HD Head is an uncooled thermal imaging camera operating in the long wave infrared (LWIR) spectral region (7.5...
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Source: primitiveproton.com
Link: https://primitiveproton.com/unidentified-anomalous-phenomena-uap/ -
Source: leonarddavid.com
Title: unidentified anomalous phenomena uap nasa independent study draws reaction
Link: https://www.leonarddavid.com/unidentified-anomalous-phenomena-uap-nasa-independent-study-draws-reaction/Source snippet
Unidentified Anomalous Phenomena (UAP) – NASA...15 Sept 2023 — NASA's Unidentified Anomalous Phenomena (UAP) Independent Study Team publ...
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Source: youtube.com
Link: https://www.youtube.com/watch?v=TQcqOW39kskSource snippet
Unidentified Anomalous Phenomena Independent Study ReportNASA commissioned an independent study team to examine unidentified anomalous ph...
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Source: salon.com
Title: nasa report finds no evidence that ufos are extraterrestrial partner
Link: https://www.salon.com/2023/09/19/nasa-report-finds-no-evidence-that-ufos-are-extraterrestrial_partner/Source snippet
NASA report finds no evidence that UFOs are extraterrestrial19 Sept 2023 — Analysis of this data is “hampered by poor sensor calibration...
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