Within Military Skies
Does NORAD See Every Object Over Colorado?
NORAD is built to detect defence threats, not to preserve scientific records of every low, small or ambiguous object seen over Colorado.
On this page
- What NORAD is designed to detect
- Why small or low altitude objects may be missed
- What records would actually strengthen a UFO claim
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Introduction
Many people assume that because NORAD is headquartered in Colorado and operates some of North America’s most sophisticated defence networks, it must know about every unusual object seen in the state’s skies. The reality is more complicated. NORAD was created to provide aerospace warning and aerospace control for North America, focusing on potential threats such as hostile aircraft, missiles and other objects relevant to continental defence. It was not designed as a scientific observatory that records every unidentified light, drone, balloon or ambiguous radar return over Colorado.[NORAD]norad.milAbout NORADAerospace warning includes the detection, validation, and warning of attack against North America whether by aircraft, mi…
This distinction matters when assessing Colorado UFO reports. The absence of a NORAD radar record does not automatically mean a sighting was imaginary, but neither does NORAD’s involvement automatically validate a report. Understanding what NORAD is built to detect—and what it may overlook, filter out or never record in the first place—helps explain why many Colorado UFO cases remain unresolved despite the state’s close association with military aerospace operations.[NORAD]norad.milAbout NORADAerospace warning includes the detection, validation, and warning of attack against North America whether by aircraft, mi…
Does NORAD See Every Object Over Colorado?
The short answer is no.
NORAD’s mission is centred on defending North America. Its systems are optimised to identify potential threats, assess them quickly and support military decision-making. Aerospace warning focuses on detecting possible attacks by aircraft, missiles or space vehicles, while aerospace control is concerned with identifying and responding to airborne threats.[norad.mil]norad.milAbout NORADAerospace warning includes the detection, validation, and warning of attack against North America whether by aircraft, mi…
That mission shapes what information is collected, how sensors are configured and which radar returns receive attention. A system designed to detect a cruise missile, strategic bomber or suspicious aircraft does not necessarily operate in the same way as a system intended to catalogue every unexplained object seen by the public.
This is one reason Colorado’s reputation as the home of NORAD can create unrealistic expectations. Witnesses sometimes assume that any unusual aerial event must have generated a detailed military track. In practice, whether an object is detected depends on its size, altitude, speed, location, radar signature and perceived relevance to defence operations.
Why Small or Low-Altitude Objects May Be Missed
The most important limitation is not a lack of technology but the basic physics and operational realities of radar surveillance.
Terrain and radar geometry
Colorado is not flat. Mountain ranges, valleys and uneven terrain can block or degrade radar coverage. Aviation guidance used by the Federal Aviation Administration notes that low-altitude aircraft may be hidden from radar by terrain or may fly below the radar beam because of Earth curvature.[Federal Aviation Administration]faa.govFederal Aviation AdministrationChapter 4. Air Traffic ControlRelatively low altitude aircraft will not be seen if they are screened by mo…
For UFO reports, this means that an object observed from the ground near mountain terrain may not necessarily appear on every surveillance system. A witness can have a clear visual view while a distant radar installation has a limited one.
Slow and small targets
Radar networks are often designed to distinguish meaningful targets from enormous amounts of background clutter. Birds, weather effects, ground reflections and other non-threatening returns can overwhelm operators if every weak signal is treated as equally important.
Military and technical sources have long noted the difficulty of tracking low, slow and small targets. Objects with minimal radar signatures can blend into background clutter, particularly at low altitude.[ResearchGate]researchgate.netResearch Gate(PDF) Study of Low-altitude Slow and Small TargetResearchGate(PDF) Study of Low-altitude Slow and Small Target…January 1, 2017 — 4 Jun 2026 — Radar has always been a key equipment for…
This issue became widely discussed in 2023 after the Chinese surveillance balloon incident. NORAD officials explained that radar systems use filters and “gates” that help prioritise certain types of targets. Following the balloon incidents, operators adjusted settings to improve detection of smaller and slower objects, and officials suggested that some newly detected objects may have been visible only because scrutiny increased.[defensescoop.com]defensescoop.comNORAD adjusts radar 'gates' to sharpen detection of…February 13, 2023 — 13 Feb 2023 — We have adjusted some of those gates…
The implication for Colorado UFO reports is straightforward: if radar settings can influence which objects receive attention, then the absence of a reported track is not proof that no object existed.
Not every object looks like a threat
A further complication is that some aerial objects simply do not resemble the kinds of targets NORAD was originally built to prioritise.
Defence systems were historically optimised around aircraft, missiles and other recognised threats. Slow-moving balloons exposed gaps in detection assumptions during recent air-defence discussions, with military leaders acknowledging that some objects had previously escaped attention because they did not fit expected threat profiles.[Time]time.comWhy America's Air Defense Network Failed to Detect the Chinese Spy BalloonsLe ballon repéré le 1er février au-dessus du Montana faisait 60 mètres de hauteur et transportait un équipement de surveillance varié. Ce…
That does not mean Colorado UFO reports involve extraordinary craft. It does mean that “NORAD would have seen it” is not always a reliable argument when the reported object was allegedly small, slow, distant or operating in an unusual manner.
Detection Is Not the Same as a Public Record
Even when a sensor detects something, that does not guarantee a publicly accessible record.
Military systems collect large amounts of information, much of which is classified, temporary, filtered or retained only for operational purposes. Defence organisations are generally concerned with assessing threats, not preserving every ambiguous track for future public analysis.
As a result, many UFO discussions assume a binary choice—either NORAD tracked the object or it did not. Reality includes a third possibility: an object may have generated data that was never considered significant enough to become part of a publicly released record.
This distinction is especially relevant in Colorado, where military facilities, restricted operations, training flights and national-security activities can complicate what information is available to civilian researchers.
What Records Would Actually Strengthen a UFO Claim?
For serious investigators, the most persuasive evidence is not a witness statement alone and not merely a claim that “radar saw something.”
A stronger Colorado UFO case would ideally include multiple independent forms of evidence recorded at the same time:
- Radar data showing an object’s position and movement.
- Visual observations from more than one location.
- Pilot, air-traffic-control or military reports that can be compared against one another.
- Time-stamped photographs or video with known camera information.
- Flight records that rule out conventional aircraft.
- Weather data and astronomical checks that eliminate common explanations.
Researchers studying unidentified aerial phenomena increasingly emphasise the value of multi-sensor observations because a single source of information can be misleading. Combining radar, optical imagery and other measurements provides a much firmer basis for analysis than eyewitness testimony alone.[arXiv]arxiv.orgOpen source on arxiv.org.
This is why many Colorado sightings remain unresolved rather than confirmed. The key missing ingredient is often not belief or scepticism but measurement.
Why This Matters for Colorado UFO History
Colorado’s military presence has encouraged a persistent belief that extraordinary sightings should be easy to verify. Yet the state’s UFO history repeatedly demonstrates the opposite lesson.
NORAD’s existence does not mean every unusual object is tracked. Defence sensors have specific missions, coverage limits and filtering priorities. Mountains can affect visibility, low-altitude objects can evade easy detection, and operational systems are not designed to create a complete scientific archive of every unexplained observation.[norad.mil]norad.milAbout NORADAerospace warning includes the detection, validation, and warning of attack against North America whether by aircraft, mi…
For readers exploring Colorado’s UFO record, this provides an important reality check. A sighting is not validated simply because it occurred near major military installations, and it is not disproved simply because no NORAD record has surfaced. The more useful question is whether the case produced the kind of independent, measurable evidence that can survive careful scrutiny. In most Colorado UFO reports, that remains the central challenge.
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Endnotes
1.
Source: norad.mil
Link:https://www.norad.mil/About-NORAD/
Source snippet
About NORADAerospace warning includes the detection, validation, and warning of attack against North America whether by aircraft, mi...
2.
Source: canada.ca
Title: norad authorities and operations
Link:https://www.canada.ca/en/department-national-defence/corporate/reports-publications/proactive-disclosure/secd-april-24-2023/norad-authorities-and-operations.html
Source snippet
NORAD Authorities and Operations24 Apr 2023 — NORAD Missions Aerospace warning: detection, validation, and warning of attack agains...
3.
Source: researchgate.net
Title: Research Gate(PDF) Study of Low-altitude Slow and Small Target
Link:https://www.researchgate.net/publication/315868273_Study_of_Low-altitude_Slow_and_Small_Target_Detection_on_Radar
Source snippet
ResearchGate(PDF) Study of Low-altitude Slow and Small Target...January 1, 2017 — 4 Jun 2026 — Radar has always been a key equipment for...
Published: January 1, 2017
4.
Source: defensescoop.com
Link:https://defensescoop.com/2023/02/13/norad-adjusts-radar-gates-to-sharpen-detection-of-anomalous-objects-as-ufo-recovery-intensifies/
Source snippet
NORAD adjusts radar 'gates' to sharpen detection of...February 13, 2023 — 13 Feb 2023 — We have adjusted some of those gates...
Published: February 13, 2023
5.
Source: naadsn.ca
Link:https://www.naadsn.ca/wp-content/uploads/2023/02/23-feb-17-Glesby-NORADs-Aerospace-Warning-Mission-Reflections-on-Recent-Incursions.pdf
6.
Source: time.com
Link:https://time.com/6255436/balloons-ufos-what-is-in-the-sky/
7.
Source: time.com
Title: Why America’s Air Defense Network Failed to Detect the Chinese Spy Balloons
Link:https://time.com/6254681/chinese-balloons-us-air-defense-network-failure/
Source snippet
Le ballon repéré le 1er février au-dessus du Montana faisait 60 mètres de hauteur et transportait un équipement de surveillance varié. Ce...
8.
Source: arxiv.org
Link:https://arxiv.org/abs/2305.18566
9.
Source: youtube.com
Title: Colorado Experience: NORAD
Link:https://www.youtube.com/watch?v=rgSIfeBBj_4
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NORAD commander on Chinese spy balloon, AI, Russia...
10.
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Title: NORAD commander on Chinese spy balloon, AI, Russia
Link:https://www.youtube.com/watch?v=0MZP9cZaBtw
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US military stumped by UFO sightings over bases: Ex-defense official...
11.
Source: faa.gov
Link:https://www.faa.gov/air_traffic/publications/atpubs/aim_html/chap4_section_5.html
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Federal Aviation AdministrationChapter 4. Air Traffic ControlRelatively low altitude aircraft will not be seen if they are screened by mo...
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Source: hstoday.us
Title: norad modernization expected as national airspace threatened
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Additional References
15.
Source: airandspaceforces.com
Link:https://www.airandspaceforces.com/PDF/MagazineArchive/Documents/2017/April%202017/0417_Brissett_NORAD.pdf
Source snippet
Air & Space Forces MagazineNORAD'sPrimary among new capabilities is the use of low-profile aircraft that fly slowly at a low altitude, ma...
16.
Source: faraim.org
Link:https://faraim.org/faa/aim/chapter-4/section-4-5-1.html
Source snippet
FAR/AIMAIM § 4-5-1 Radar | Aeronautical Information ManualRelatively low altitude aircraft will not be seen if they are screened by mount...
17.
Source: wads.ang.af.mil
Link:https://www.wads.ang.af.mil/About-Us/Fact-Sheets/Article/1175459/north-american-aerospace-defense-command/
Source snippet
North American Aerospace Defense CommandNORAD uses a network of satellites, ground-based radar, airborne radar and fighters to detect...
18.
Source: youtube.com
Title: U.S. reveals new details about flying objects and decision to shoot them down
Link:https://www.youtube.com/watch?v=a2x4_9hp8XM
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One-on-one with the NORAD commander months after Chinese spy balloon incident...
19.
Source: youtube.com
Title: US military stumped by UFO sightings over bases: Ex-defense official
Link:https://www.youtube.com/watch?v=nh_YRWtTXzg
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A Cheap Drone Could Cripple U.S. National Security: 4-Star General Explains Why...
20.
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