Documents / Report
This information paper from the All-domain Anomaly Resolution Office (AARO), dated May 2024, explains how forced perspective and parallax can lead observers to misjudge the size, speed and direction of unidentified anomalous phenomena. Using examples such as the Leaning Tower of Pisa, a featureless sphere and an airborne sensor passing over a river, it shows how stationary objects can seem to move. It concludes that single-observer reports still matter and that observers should estimate range, size and speed.
All-domain Anomaly Resolution Office (AARO) 4 Figure 3: Parallax causes the position of an object to be projected at different points against a background. As the observer moves, the changes in background projections cause the object to have an apparent motion. Summary Not all reports of fast-moving UAP are attributable to the effects of forced perspective or parallax. However, in some cases, the effects of these phenomena are known to cause inaccurate estimations of a UAP’s size, speed, and direction of travel. These phenomena consequently affect data derived from a single sensor moving very fast relative to the target object. Despite this susceptibility, single-observer reports are critical to consider in AARO analyses. These reports can supplement additional sensor data to help create a more holistic picture of an object’s size and speed. Observers submitting a UAP report should still estimate range, size, and speed as part of a complete description of their observation. Observers with a more robust understanding of forced perspective and parallax are better equipped to assess a UAP’s characteristics and provide more context to these details in their reporting.
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Report, from the aaro collection. The PDF is mirrored here; the original link is above. 4 pages are in the text index: search them above, or from the library's search.