Source Library · SRC-V99-025 · Modern interpretive research
NORAD national air defense UFO alert, Sept 20 1957 (Brad Sparks reconstruction)
Christopher Mellon website / Brad Sparks · Undated
Record
- Author / institution
- Christopher Mellon website / Brad Sparks
- Date
- Undated
- Source type
- Modern interpretive research
- Used for
- CASE-085 competing interpretation: higher apparent speeds and possible IFF responses
- Limitations
- Secondary reconstruction; apparent radar velocities do not establish a physical vehicle's velocity; test against original plots
Link
https://www.christophermellon.net/post/norad-national-air-defense-ufo-alert-sept-20-1957