28939455.pdf

PROJECT 10073 RECORD CARD

|  1. DATE | 2. LOCATION | 2. CONCLUSIONS  |
| --- | --- | --- |
|  26 Aug 51 | Larson AFB, Washington | ☐ Was Balloon ☐ Probably Balloon ☐ Possibly Balloon  |
|  3. DATE-TIME GROUP | 4. TYPE OF OBSERVATION | 4. WAS AIRCRAFT ☐ Probably Aircraft ☐ Possibly Aircraft  |
|  Local GMT 26/1628Z | ☐ Ground-Visual ☑ Ground-Radar ☐ Air-Visual ☐ Air-Intercept Radar | ☐ Was Astronomical ☐ Probably Astronomical ☐ Possibly Astronomical  |
|  5. PHOTOS | 6. SOURCE | 6. OTHER Elec Interference  |
|  ☐ Yes ☑ No | Military | ☐ Insufficient Data for Evaluation ☐ Unknown  |
|  7. LENGT…

UNCLASSIFIED
SECRET
By Auth of CO 637th
Init: WWS Date: 26 Aug 51
32
26 Aug 51
DETACHMENT 1
637TH AIRCRAFT CONTROL AND WARNING SQUADRON
162D AIRCRAFT CONTROL AND WARNING GROUP
Larsen Air Force Base
Moses Lake, Washington
DET-1-ACW-37 30 August 1951
SUBJECT: Report of Unconventional Object
TO: Commanding General
Air Material Command
Wright-Patterson AFB
Dayton, Ohio
ATTN: MCIS
The attached Air Intelligence Information Report is submitted in
compliance with Air Defense Command Letter 200-1 dated 11 April 1951.
William W. Sharp
Captain USAF
Commanding
2 Incls
Incl 1 - AF Form 112 Part 1 (dup)
Inc…

AF FORM 112—PART I
APPROVED 1 JUNE 1948
UNCLASSIFIED

|  COUNTRY | United States | JOURNAL NO. | 1  |
| --- | --- | --- | --- |
|  AIR INTELLIGENCE INFORMATION REPORT  |   |   |
| --- | --- | --- |
|  REPORT | Report of Unconventional Object  |   |
|  DATE REPORTED ON | 25th Air Division - Subsector C | FROM (Agency) Detachment 1 637th Aircraft Control & Warning Sq  |
|  DATE OF REPORT | 30 August 1951 | DATE OF INFORMATION 26 August 1951  |
|  PREPARED BY (Officer) | Captain Ernest W. Rees | SOURCE Radar  |
|  REFERENCES (Control number, number, practice report, etc., as applicable) | Air Def…

UNCLASSIFIED
AF FORM 172—PART II
AF501(40) 1 JUNE 1948
AIR INTELLIGENCE INFORMATION REPORT

|  FROM (Agency) | REPORT NO. | PAGE 1 OF 1 PAGES  |
| --- | --- | --- |
|  Detachment 1 637th ADSN Squadron | 1 |   |

This report follows the outline of paragraph 5a(1) of Air Defense Letter 200-1 dated 11 April 1951.

(a) An unidentified flying object was detected by radar 26 August 1951. It held a nearly constant heading directly toward the radar station, with an average ground speed of 948 miles per hour. This object was in continuous radar contact from detection to fade.

(b) The initial pickup wa…

UNCLASSIFIED
SECRET
AUTH: CO, ATIC
BY: Lt Col N.R. Rosengarten
DATE: 5 Sep 51

Air Technical Intelligence Center
Wright-Patterson Air Force Base, Dayton, Ohio
051330Z
PRIORITY

Commanding Officer
Larson Air Force Base
Moses Lake, Washington

DET-1-ACW-37

For Detachment 1, 637th Aircraft Control and Warning Squadron, 162D Aircraft Control and Warning Group, Captain William W. Sharp.

Reference your radar sighting of 26 August 1951, please advise immediately whether weather conditions prevalent in your area at that time favor the phenomena of anomalous micro wave propagation which results in sp…

DECLASSIFIED
OR INTELLIGENCE
DTS
Remy M4
Action Info

PARAPHASE NOT REQUIRED. SEE CRYF J-CENTER
FORE DECLASSIFYING OR INTELLIGEE
UNCLASSIFIED
PRIORITY

NBR 28 08 SEPT 51
05:17,
C-1 SECRET PRIORITY
Cite,
FROM LARSEN AFB MOSES LAKE WASH
TO AMC WPAFB DAYTON OHIO

DET 1-ACW-37 SPACE 1089 REF UR MESG DTG AT 7086 FR ATSC.
WEEOCOND AT TIME OF SIGHTING DID NOT FAVOR ANOMALOUS MICRO WAVE
PROPAGATION. NO TEMP INVERSION WAS RED AND LOW MOISTURE CONTENT WAS
PRESENT AT TIME OF SIGHTING APPROX SHAPE TGT WAS
RATHER LARGE IRREGULAR SHAPED BLIP/NOT ROUND OR ELONGATED/ NO PHOTO
OF TGT RET ARE AVAL

AT-7086-51S-…

UNCLASSIFIED
Status Report #1
Appendix III
LARSON AFB, WASHINGTON - 26 August 1951

On 26 August 1951 at 0836 PST, an unidentified flying object was detected by an AN/CPS-4 and AN/CPS-1 radar sets. The object was tracked continuously for a period of six minutes and made a timed ground speed of 950 mph. The object was on a course of 340° with only slight deviations enroute. An altitude reading of 13,000 feet was obtained but the accuracy of the measurement is questionable due to brief length of time the object was detected.

The F-86 aircraft were scrambled but radar contact with the object was…

CONFIDENTIAL
UNCLASSIFIED
Appendix III
LARSON AFB, WASHINGTON - 26 August 1951

On 26 August 1951 at 0836 PST, an unidentified flying object was detected by an AN/CPS-4 and AN/CPS-1 radar sets. The object was tracked continuously for a period of six minutes and made a timed ground speed of 950 mph. The object was on a course of 340° with only slight deviations enroute. An altitude reading of 13,000 feet was obtained but the accuracy of the measurement is questionable due to brief length of time the object was detected.

The F-86 aircraft were scrambled but radar contact with the object was los…