AARO "Western United States" UAP Case Resolution Report

AARO Report landing 2020s Official link verified

Summary

AI-assisted summary — not an official document and not authoritative. It condenses the machine-extracted text; the original is the only authoritative source. Generated by summary:claude-opus-4-8@v1; last reviewed 2026-05-28.

AARO's 'Western United States' case resolution (8 May 2023). AARO assesses five infrared lights reported in 2021 as a possible airspace incursion were almost certainly commercial aircraft as far as 300 nautical miles from the sensor.

AARO's case resolution report for the "Western United States" case, dated 8 May 2023. In 2021, military personnel reported five equidistant infrared lights at 20,000 to 40,000 feet, believing they represented a possible incursion into restricted military airspace. AARO assesses the lights almost certainly were commercial aircraft traveling on established air corridors as far as 300 nautical miles from the sensor. AARO's intelligence and science-and-technology (S&T) partners independently reached the same conclusion: analysis of the objects' positions and air-traffic-control data showed they were far more distant than observers estimated, and their apparent shape changes resulted from sensor vibration and autofocus. The S&T partners used boresight analysis to place the aircraft at an altitude of 20,000 to 40,000 feet at a comparable distance.

Common questions

What did AARO conclude about the five infrared lights reported over the western United States in 2021?
AARO assesses the lights almost certainly were commercial aircraft traveling on established air corridors as far as 300 nautical miles from the sensor, not an incursion into restricted military airspace as initially reported.
Why were the western United States objects misidentified as a possible airspace incursion?
The report states the aircraft were far more distant than observers estimated, and their apparent shape changes resulted from sensor vibration and autofocus. Boresight analysis placed the aircraft at 20,000 to 40,000 feet at a comparable distance.
What altitude were the western United States objects reported at?
Military personnel reported five equidistant infrared lights at 20,000 to 40,000 feet. AARO and its partners confirmed the objects were commercial aircraft at comparable altitudes but far greater range.

Source & Classification

Record metadata

Record type
Report landing
Decade
2020s
Review status
published
Publication status
published

Official source link

https://www.aaro.mil/UAP-Cases/UAP-Case-Resolution-Reports/

Preservation copy (PDF) ⬇ · 502 KB · 2 pp A local preservation copy of this public-domain U.S.-government document. The official source above is authoritative.

Documents are linked to their official source pages, with a local preservation copy of the public-domain U.S.-government document where available; the official source is authoritative. Videos are linked, not hosted. Copyright and license notes are recorded per source.

Topics

Cite this record

All-domain Anomaly Resolution Office (AARO). "AARO "Western United States" UAP Case Resolution Report". 2020s. Official source: https://www.aaro.mil/UAP-Cases/UAP-Case-Resolution-Reports/. Cataloged by the independent UAP Records Archive (not an official or government source): https://uap-archive.org/uap/records/aaro-western-united-states/.

APA

All-domain Anomaly Resolution Office (AARO). (2020s). AARO "Western United States" UAP Case Resolution Report. https://www.aaro.mil/UAP-Cases/UAP-Case-Resolution-Reports/

MLA

All-domain Anomaly Resolution Office (AARO). "AARO "Western United States" UAP Case Resolution Report." 2020s, https://www.aaro.mil/UAP-Cases/UAP-Case-Resolution-Reports/.

Chicago

All-domain Anomaly Resolution Office (AARO). "AARO "Western United States" UAP Case Resolution Report." 2020s. https://www.aaro.mil/UAP-Cases/UAP-Case-Resolution-Reports/.

BibTeX

@misc{uaprecords_aaro-western-united-states,
  title  = {AARO "Western United States" UAP Case Resolution Report},
  author = {All-domain Anomaly Resolution Office (AARO)},
  year   = {2020s},
  howpublished = {Official source: https://www.aaro.mil/UAP-Cases/UAP-Case-Resolution-Reports/},
  note   = {Cataloged by the independent UAP Records Archive — not an official or government source},
  url    = {https://uap-archive.org/uap/records/aaro-western-united-states/}
}

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<figure style="max-width:600px;margin:0;">
  <a href="https://uap-archive.org/uap/records/aaro-western-united-states/"><img src="https://uap-archive.org/og/records/aaro-western-united-states.png" alt="AARO &quot;Western United States&quot; UAP Case Resolution Report — UAP Records Archive" width="600" style="width:100%;height:auto;border:0;" loading="lazy"></a>
  <figcaption style="font-size:13px;line-height:1.5;">All-domain Anomaly Resolution Office (AARO). &quot;AARO &quot;Western United States&quot; UAP Case Resolution Report&quot;. 2020s. Official source: https://www.aaro.mil/UAP-Cases/UAP-Case-Resolution-Reports/. Cataloged by the independent UAP Records Archive (not an official or government source): https://uap-archive.org/uap/records/aaro-western-united-states/. <a href="https://uap-archive.org/uap/records/aaro-western-united-states/">View record →</a></figcaption>
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Evidence

License note (source-level)

AARO content is US Department of Defense work, generally public domain under 17 U.S.C. §105. DoD seal and identity usage is governed by 18 U.S.C. §701 and DoD Directive 5410.20 and is not used by this archive. License treatment for specific linked documents will be assessed before any indexed or monetized release.

Archivist note

AARO’s case resolution report for the “Western United States” case, dated 8 May 2023. In 2021, military personnel reported five equidistant infrared lights at 20,000–40,000 feet as a potential incursion into restricted military airspace. AARO assesses the lights almost certainly were commercial aircraft on established air corridors as far as 300 nautical miles from the sensor.

The full English text below is machine-extracted from the linked PDF for reference; the original document is authoritative. This archive links the official source and an archive snapshot, and does not reproduce the DoD or AARO visual identity.

Full text (machine-extracted)

Machine-extracted text (tool: unpdf@1.6.2), reviewed by user:opus-review on 2026-05-28. Derived from the linked PDF; the original PDF (see official source / archive) is authoritative.

— p. 1 — UNCLASSIFIED 1 UNCLASSIFIED All-domain Anomaly Resolution Office U.S. Department of Defense (U) Case: “Western United States” Case Resolution | 8 May 2023 (U) Case Essentials (U) Military personnel reported this case due to the observed UAP presenting a potential incursion into restricted airspace. The UAP were described as equidistant lights that flew at a relatively constant pace (U) Location: Western United States military airspace (U) Date(s): 2021 (U) Altitude: Between 20,000 to 40,000 feet (U) Shape: Oblong dots/lights (U) Reporter: Military personnel (U) Sensor: Infrared (IR) (U) Behavior: Equidistant lights that flew at a relatively constant pace (U) Case Status: Resolved; the lights were aircraft up to 300NM away from the sensor (U) Case Overview (U) AARO assesses that the UAP in this case were almost certainly commercial aircraft travelling on well-established air corridors as far as 300 nautical miles from the platform, based on a thorough review of the data by multiple analytical and scientific entities.  (U) Military personnel reported seeing five equidistant lights that they believed represented a potential incursion into restricted military airspace.  (U) AARO’s Intelligence and Science and Technology (S&T) partners independently came to the same conclusion in accordance with AARO’s analytic framework.  (U) The objects strongly correlated with specific commercial aircraft travelling on different air routes up to 300 nautical miles from the sensor. (U) Intelligence Assessment (U) Analysis of the objects’ positions and acquisition of additional data led AARO to the conclusion that the objects were significantly farther from the platform than originally estimated by the observers.  (U) Apparent changes in the UAP shapes were the result of sensor vibration and autofocus.  (U) Analysis of air-traffic control data suggested the objects were likely commercial aircraft transiting known flight corridors between major airports in the region. — p. 2 — UNCLASSIFIED 2 UNCLASSIFIED (U) Science & Technology Assessment (U) AARO’s S&T partners independently came to the same conclusion. (U) AARO’s S&T partners used boresight analysis to determine that the UAP were commercial aircraft at an altitude of between 20,000 to 40,000 feet at a similar distance. (U) Figure 1: Western U.S. UAP shape distortion due to sensor vibration

Uncertainty / Limits

Archive state (this release)

Record status
Official link verified
Review status
published
Publication status
published
Archive URL
Not archived in U3
Local copy
Preservation copy hosted on this site
Summary
Not published
Translation
Not published
Added to archive
Last revised
· 2 revisions

Translation

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