# Sappenfeld 1980: Possible Origins of Event 747 Optical Data

> D. S. Sappenfeld, D. H. Sowle, T. H. (Mission Research Corporation) McCartor, 1980. 1 records on Mysteries Department cite it. The AFTAC contractor's…

Source: https://mysteriesdept.com/sources/SRC0CW4WKFP6R03/possible-origins-of-event-747-optical-data  
Publisher: Mysteries Department  
Licence: CC BY 4.0 (credit Mysteries Department and link the page)  

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[Sources](https://mysteriesdept.com/sources)[1979 Vela incident](https://mysteriesdept.com/mysteries/vela-incident)Sappenfeld 1980

**0**

# Possible Origins of Event 747 Optical Data

D. S. Sappenfeld, D. H. Sowle, T. H. (Mission Research Corporation) McCartor, 1980. _National Security Archive Electronic Briefing Book 190, Document 11_.

An expanded August 1980 version of a December 1979 report for AFTAC. Concludes, as before, that a nuclear detonation was much more likely than any non-nuclear trigger of the bhangmeters, that the data indicate a surface burst, and that the Ruina panel's meteoroid theory has serious flaws; it proposed that the bhangmeter difference could come from a malfunction.

**1979 Vela incident** ReportChecked against the original0

## What it's used for here

The AFTAC contractor's analysis of the optical record.

## The document 85 pages

[Pages]Page 1 of 85

[![Page 1](https://mysteriesdept.com/files/v/544e95d2a746dab4051362cf44c5d6a44da0781982e8e7850e89cb98fbfa74e0/p1)1][![Page 2](https://mysteriesdept.com/files/v/544e95d2a746dab4051362cf44c5d6a44da0781982e8e7850e89cb98fbfa74e0/p2)2][![Page 3](https://mysteriesdept.com/files/v/544e95d2a746dab4051362cf44c5d6a44da0781982e8e7850e89cb98fbfa74e0/p3)3][![Page 4](https://mysteriesdept.com/files/v/544e95d2a746dab4051362cf44c5d6a44da0781982e8e7850e89cb98fbfa74e0/p4)4][![Page 5](https://mysteriesdept.com/files/v/544e95d2a746dab4051362cf44c5d6a44da0781982e8e7850e89cb98fbfa74e0/p5)5][![Page 6](https://mysteriesdept.com/files/v/544e95d2a746dab4051362cf44c5d6a44da0781982e8e7850e89cb98fbfa74e0/p6)6][![Page 7](https://mysteriesdept.com/files/v/544e95d2a746dab4051362cf44c5d6a44da0781982e8e7850e89cb98fbfa74e0/p7)7][![Page 8](https://mysteriesdept.com/files/v/544e95d2a746dab4051362cf44c5d6a44da0781982e8e7850e89cb98fbfa74e0/p8)8][![Page 9](https://mysteriesdept.com/files/v/544e95d2a746dab4051362cf44c5d6a44da0781982e8e7850e89cb98fbfa74e0/p9)9][![Page 10](https://mysteriesdept.com/files/v/544e95d2a746dab4051362cf44c5d6a44da0781982e8e7850e89cb98fbfa74e0/p10)10][![Page 11](https://mysteriesdept.com/files/v/544e95d2a746dab4051362cf44c5d6a44da0781982e8e7850e89cb98fbfa74e0/p11)11][![Page 12](https://mysteriesdept.com/files/v/544e95d2a746dab4051362cf44c5d6a44da0781982e8e7850e89cb98fbfa74e0/p12)12]

![Page 1 of Possible Origins of Event 747 Optical Data](https://mysteriesdept.com/files/v/544e95d2a746dab4051362cf44c5d6a44da0781982e8e7850e89cb98fbfa74e0/p1)

The first 12 pages are shown; the rest are in the file. Pages from the file we keep.

## Cited by on this site 1 record

[The 1979 Vela incident](https://mysteriesdept.com/mysteries/vela-incident)

The mystery article

MYS

## Cite it

```
Sappenfeld, D. S., Sowle, D. H., & McCartor, T. H. (. R. C. (1980). Possible Origins of Event 747 Optical Data. National Security Archive Electronic Briefing Book 190, Document 11. https://nsarchive2.gwu.edu/NSAEBB/NSAEBB190/11.pdf
```

[Read it free at nsarchive2.gwu.edu](https://nsarchive2.gwu.edu/NSAEBB/NSAEBB190/11.pdf)[Download PDF · 6.0 MB](https://mysteriesdept.com/files/d/544e95d2a746dab4051362cf44c5d6a44da0781982e8e7850e89cb98fbfa74e0)

Anyone can read it here; members can download it.

Key

**SRC** 0CW4WKFP6R03

Kind

Report

Rights

public-domain

Kept

27 Oct 2026

Checked

Against the published original

Added by

[apollo](https://mysteriesdept.com/u/apollo)

The record

Bibliographic records are CC0. Take this one as CSL-JSON, BibTeX or RIS.

[CSL-JSON](https://mysteriesdept.com/sources/SRC0CW4WKFP6R03/possible-origins-of-event-747-optical-data/csl.json)