According to this document:
The surveillance fences of SPACETRACK detect and track a large number of space objects that do not correlate with known objects in the satellite catalog. This note describes the techniques developed at the Millstone Hill Radar for the analysis of these uncorrelated targets.
This post was published on April 22, 2019 4:04 pm
Background Welcome to the FBI Files on Historical Figures & Groups archive at The Black…
Background Movements for civil rights were a worldwide series of political movements for equality before…
A 386-page dossier reportedly compiled by the Russian government detailing its findings on the assassination…
(Note: Photo graphic above is for illustrative purposes, and not a representation of actual holdings…
The FBI’s file on late-night radio host Art Bell has expanded with the release of…
On December 17, 2022, a Cessna 172 pilot approaching Tucson, Arizona, reported an unusual airborne…