HAARP Imaging Riometer Diagnostic
| Author | T. J. Rosenberg (Advanced Power Technologies, Inc.) |
|---|---|
| Published | July 16, 1997 |
| Format | Report |
| Original | Read the original |
TL;DR — A 1997 Air Force contractor report on a prototype imaging riometer built at the HAARP site in Alaska to map radio absorption in the ionosphere.
Final report PL-TR-97-2101 for the Air Force’s Phillips Laboratory (Hanscom AFB), covering a contract from 1991 to 1997, by Advanced Power Technologies with the University of Maryland, and approved for public release.
It describes a 16-beam imaging riometer, an instrument that measures how much cosmic radio noise the ionosphere absorbs, installed at the HAARP research site near Gakona, Alaska. The report covers the antenna array, its sensitivity to absorption caused by geomagnetic storms, early observations, and the hope that the imaging capability could detect small changes in the ionosphere caused by HAARP’s own radio transmitter.
What it is: a routine technical contractor report on a scientific instrument. HAARP attracts conspiracy theories; this document is ordinary ionospheric physics.
Where this came from
- A copy saved in October 2026.
- Public copy in the Internet Archive’s DTIC collection.
20 pages. A copy is archived locally against link rot; the header links the original source.