Documents / Report
This National Security Agency release, Part E of a series of Communications Intelligence (COMINT) reports, is undated and heavily redacted. It contains classified message traffic marked Secret Spoke and Top Secret Umbra. The messages record radar tracking of unidentified flying objects, often several at a time, at altitudes from about 500 to 88,500 feet. Most entries describe the objects as probably balloons. Locations, sources and many dates have been removed.
Read from the scan by GLM-OCR; expect the odd misread word.
T O T O E O R E T U M R R A 6. RADAR TRACKING OF UNIDENTIFIED FLYING OBJECTS (UFO:) A. 1043-1133, ONE UFO (PROBABLY A BALLOON) FLEW FROM 105 NAUTICAL MILES (NM) 284 DEGREES (DEG) OFF AND FADED 128 NM 2929 DEG OFF ALT 500-59,000 FT. B. 1229-1236, ONE UFO (PROBABLY A BALLOON) FLEW FROM 105 NM 284 DEG OFF AND FADED 128 NM 2929 DEG OFF ALT 49.200-56.000 FT.
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Report, from the nsa collection. The PDF is mirrored here; the original link is above. The text was read from the page images by GLM-OCR; expect the odd misread word. 25 pages are in the text index: search them above, or from the library's search.