DOW-UAP-D100, Air Materiel Command Report on Unidentified Flying Objects, 1947-1948
This file is a collection of U.S. Government memoranda and correspondence relating to “Project Sign,” a 1948 U.S. Air Force program to investigate reports of high-performance airborne objects. The documents characterize some of these reports as being consistent with “real”...
Source details
- Media type
- document
- Archive path
- Release_5/DOW-UAP-D100_Air-Materiel-Command-Report-on-UFOs_1947-1948.pdf
- Source agency
- Department of War
- Event date
- 1947-1948
- Location
- N/A
- Release date
- 8/7/26
- Last updated
- 2026-08-05
- Source file
- Open source file
Source Summary
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Analysis of this record
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- C101 Release 5 Companion Map and Disclosure Bridge
Interpretive reconstruction - not source evidence. This navigation plate combines the release's historical-paper, radar/film-analysis, triangle-witness, and modern sensor layers. No pictured page, radar display, triangle, or thermal monitor is a...
Open analysis in viewer - C102 Release 5 Historical Intelligence and Scientific Analysis
D099 page 3 describes reports ranging from fireballs with tails to shiny cigar-shaped objects, with wildly varying altitude and speed estimates. It notes that most witnesses were untrained and that no recovered fragment exceeded ambiguous nonmetallic slag.
Open analysis in viewer - C109 Release 5 Cross Release Synthesis and Evidence Gaps
Integration of Release 5 historical analysis, witness/rendering packets, operational reports, and three representative video sequences with the existing Releases 1-4 evidence model.
Open analysis in viewer - C114 Ruppelt Briefing and the 1952 Evidence Problem
Ruppelt's briefing is unusually valuable because the same speaker presents striking radar reports and explains why they were not yet physically secure. Release 6 preserves an argument for better data collection, not an announcement that the unexplained...
Open analysis in viewer
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