28937545.pdf

10/01402

DATE OF INFO 9 March 1950

LOCATION Selfridge AFB, Mich.

SOURCE Radar Operators

DATE IN TO ATIC

SOURCE

SPEED Up to 1500 MPH

ANTITUDE Up to 45,000'

LENGTH OF TIME OBSERVED

TYPE OF OBSERVATION Radar Scope

MANUFACTURE Changes in altitude very fast
Object was observed in the area of Selfridge AFB for several hours by two radar
sets. Object was in erratic flight. Analysis by radar station
personnel is doubtful if return was due to phenomena.

Size comparable to X-36.

(2 Jan 52)

ATIC Form 329

(2 Jan 52)

33
SECRET
HEADQUARTERS
CONTINENTAL AIR COMMAND
MITCHEL AIR FORCE BASE, NEW YORK
Classified
by Auth: CG JSRAC
APR 1950
(Date) (Initials)
503.2
INT 373.5 (E)
SUBJECT: Unidentified Flying Object
TO: Director of Intelligence, Headquarters United States Air Force, Washington 25, D. C.

1. Attached for your information are two narrative reports concerning radar sighting of an unidentified flying object.

2. The fact that the object was sighted on the scopes of two (2) radars is considered worthy of special note.

3. Comment of technical experts, this headquarters, was solicited and is quoted in part…

UNCLASSIFIED

INT 373.5 (E), "Unidentified Flying Object", (cont)

observed on the CPS-4 height-finder before being observed on the CPS-5 surveillance radar set. This follows logic and field experience, inasmuch as the high altitude coverage of the CPS-5 is known to be poor and the antenna is not capable of being automatically tilted as in the case of the CPS-4 on which the controller may tilt the antenna within wide limitations to observe any high altitude or high angle objects. It is to be noted that previous field experience with a CPS-5 surveillance radar set has indicated that targets pic…

UNCLASSIFIED
SECRET
10 March 1950

NARRATIVE REPORT OF
1ST LT FRANCIS E. PARKER, AC 743 489, 631ST AC & W SQ, CCI STA COMDR,
SELFRIDGE AFB, MICHIGAN

On the night of 9 Mar 50, our radar station was in operation
monitoring night flying by units of the 56th Fighter-Interceptor
Group, Selfridge AFB, Mich. I came on duty approximately at sundown,
relieved 1st Lt Mattson at the PPI scope (of the AM/CPS-5 Radar Sight),
and established contact with the F-80's already airborne. Lt Mattson,
Sgt McCarthy, and Cpl Melton, who made up the rest of our crew for
this night, mentioned to me at this time t…

UNCLASSIFIED

the target hovered in one position and also that it progressed from a position given as 270°, 78 miles at 45,000 feet to a position at 358°, 58 miles at roughly the same altitude, in 4 1/2 minutes. This would give it a speed upwards of 1,500 miles per hour for this run. I cannot substantiate this speed. Coverage of target during this run was reportedly intermittent and the times were not to my knowledge accurately tabulated at actual instances of radar pick-up during this run. Subsequent individual questioning I undertook with members of the crew bear out the possibilities of ina…

UNCLASSIFIED

six minute period listed above to a 123°, 87 miles 31,000 feet where it faded for the night from the CPS-4.

The CPS-5 was very accurate on this particular night which was supported by F-30 pilots agreement with many geographical positions given them off the CPS-5. The AN/CPS-4, though a more erratic piece of equipment, could not, through any known or prevalent weakness in its operation, account for this manner of extreme changes in altitude. I went over all possible errors which could be induced by AN/CPS-4 error exhaustively with my technical personnel.

We are continuing inves…

CONFIDENTIAL
UNCLASSIFIED
DEPARTMENT OF THE AIR FORCE
HEADQUARTERS UNITED STATES AIR FORCE 5D-OSI/DML/fmn
WASHINGTON
THE INSPECTOR GENERAL, USAF
5TH DISTRICT OFFICE OF SPECIAL INVESTIGATIONS
WRIGHT-PATTERSON AIR FORCE BASE, DAYTON, OHIO
IN REPLY REFER TO: 5D 24-21 14 March 1950

SUBJECT: "PROJECT GRUDGE" Unconventional Type Aircraft
(Unexplained "Blip" on Radar Scopes Caused by
Metallic Targets)
SPECIAL INQUIRY

TO: Commanding General
Air Materiel Command
Wright-Patterson Air Force Base
Dayton, Ohio
ATTN: MCIAXS
/AXA
503.14

The attached copies of a spot report regarding the above subject,
dat…

UNCLASSIFIED
CONFIDENTIAL
DEPARTMENT OF THE AIR FORCE
HEADQUARTERS UNITED STATES AIR FORCE
WASHINGTON

The Inspector General USAF
25th District Office of Special Investigations
Box 326, RPA, Detroit 32, Michigan

10 March 1950

SPOT INTELLIGENCE REPORT

SUBJECT: Unconventional Type Aircraft
(Unexplained "Blip" on Radar
Scopes Caused by Metallic Targets)

TO: Director of Special Investigations
Headquarters United States Air Force
Washington 23, D. C.
ATTN: Counter Intelligence Division

1. SYNOPSIS: 1st Lt. FRANK K. MATTSON, AO-926313, Radar Operator and Controller, 661st AC & W Squadron, S…