UAP Speeds and Radar

Summary

This declassified document examines how unidentified aerial phenomena (UAP) can be detected by UK military radars. Tables show calculations of velocity, distance, and exposure time within the radar beam. At extremely high speeds, such as 15,000 meters per second, the time a UAP spends within the radar beam is drastically reduced, limiting the number of pulses the radar can receive and thus the probability of detection. Conversely, if the UAP moves in the same direction as the radar beam, it can remain in the beam longer, increasing the chance of detection. The document also includes data on radar cross-section (RCS) of animals and insects, allowing comparisons between natural objects and UAP. These analyses are key to understanding why some UAP are not easily detectable and how their behavior might affect aviation safety.