28940844.pdf

PROJECT 10073 RECORD CARD

|  1. DATE | 2. LOCATION | 3. SOURCE | 4. TIME  |
| --- | --- | --- | --- |
|  2 MAR 52 | NATIONAL CITY, CALIF | ALCO EXR | ALCO EXR  |
|  4. TIME | 5. NUMBER OF OBJECTS | 6. SHAPE | 7. COLOR  |
|  Local 1930PST ± 0330 | ONE | BALL | GREEN  |
|  8. COURSE | 9. ALTITUDE | 10. ANGULAR VELOCITY | 11. PHOTOS  |
|  E | 21000' | ☐ per second | ☐ Yes ☑ No  |
|  12. TYPE OF OBSERVATION (CAR) | 13. LENGTH OF TIME OBSERVED | 14. MANEUVERS | DELETING  |
|  GROUND, VISUAL | 5 sec. |  |   |
|  15. CONCLUSIONS |  | 16. COMMENTS | COMPUTED BY DESUE - 348° DIA. COSUE. 4/6 DESIGN EAS…

DEPARTMENT OF THE AIR FORCE
HEADQUARTERS UNITED STATES AIR FORCE
WASHINGTON

UNCLASSIFIED

THE INSPECTOR GENERAL USAF
18th DISTRICT OFFICE OF SPECIAL INVESTIGATIONS
AF SPECIALIZED DEPOT, BOX 310, MAYWOOD, CALIF.

18B 24-0 11 July 1952

SPOT INTELLIGENCE REPORT

SUBJECT: Findings of Unconventional Airborne Objects, San Diego, California, March to June 1952.

TO: Director of Special Investigations
Headquarters United States Air Force
Washington 25, D. C.

1. SYNOPSIS: Source of Information, an aero-nautical engineer, San Diego, California, and associates residing in different localities in the S…

UNCLASSIFIED
11 July 1952

18D 24-0

Subject: Findings of Unconventional
Airborne Objects, San Diego,
California, March to June 1952.

All of the above reports, along with the computations of Mr. and his colleagues, are inclosed in the attached envelope as Inclosure #1 to this report, for the Commanding General, Air Materiel Command, Wright-Patterson Air Force Base, Dayton, Ohio, Attention: MCIS.

3. ACTION: No further action in this matter is contemplated; however, if and when additional reports are received from Mr. CARR, they will be promptly forwarded for evaluation.

KEEFE O'KEEFE
Colonel…

CREDIT ON GREEN "FINE BALL"

Date: March 2, 1952
Place: National City, California
Time: Approximately 7:30 P.M. PST

While driving my car east on 18th St., my wife and I observed what appeared like lighting flashing and illuminating the surrounding ground, houses, and trees with a green light.

My wife exclaimed, "Look, it's lightning!" I said, "Yes, that's unusual, look, it's green!" I looked around in the sky and saw through the windshield, by leaning forward over the steering wheel and looking up, a green ball of brilliant light. In size, it was about as large as the full moon. The color wa…

COMPUTATIONS ON GREEN FIREBALL OF MAR. 2, 1952

C = 6.33 MILES
d = 4.06 MILES

A
20°
L = 6.34 MILES

ASBURY'S POINT OF VIEW
38TH & EL CAJON
SAN DIEGO

CARR'S POINT OF VIEW
18TH NEAR NEWELL ST
NATIONAL CITY

$$
d = \frac{c}{cot A - cot B} = \frac{6.34}{2.75 - 1.19} = \frac{6.34}{1.56} = 4.06 \text{ MILES}
$$

$$
c = d \cdot csc B
$$

$$
= 4.06 \times 1.56
$$

$$
= 6.33 \text{ MILES}
$$

$$
\frac{0.208 \text{ FT.}}{0.0038 \text{ MILE}} \times \frac{1}{\text{cm}} = \frac{0.0208 \text{ FT.}}{0.0038 \text{ MILE}} = 6.33 \text{ M.I.}
$$

$$
0.0038x = 0.1317
$$

$$
x = 346.5 \text{ FT. DIA.}
$$

…

8:55 P.M. P.D.S.T.
MAY 13, 1952
LATITUDE 32° NORTH

DECLINATION OF
URSA MAJOR = APPROX. 57°

PLANTS

ALTITUDE OF POINT OF
ORIGIN OF RED TRAIL
LEFT BY OBJECT = 117.5
MILES.

CARR'S POINT
OF OBSERVATION
2408 E. 18TH ST.
NATIONAL CITY,
CALIFORNIA.

ASSUMED TO
DE 30° ANGLE (CHECK IN EPHEMETRIS FOR
TIME, DATE & LONGITUDE)
BASE LINE

12.25 MILES
PER COUNTY SURVEYOR'S MAP

85°
HANEY'S
POINT OF
OBSERVATION
970 1ST AVE
EL CAJON,
CALIFORNIA.

SIGNED:

FOR VAL OF 6° OF ARC (17TH VESA MAJOR
8° FROM METRODIAN
SIN 92° = .99939

![img-0.jpeg](img-0.jpeg)

$$
\begin{array}{l}
b = \frac{12.25 \times .99939}{.1045} \\
= \frac{12.243}{.1045} \\
= 117.1 \text{ MILES}
\end{array}
$$

![img-1.jpeg](img-1.jpeg)

$$
\begin{array}{l}
b = 117.1 \times \sin 30^\circ \\
= 117.1 \times .866 \\
= 101.41 \text{ MILES.}
\end{array}
$$

FOR VAL OR 3 OF THE 600 MARCH ORSA MAUROR
8° FROM MERIDIAN
cos 3° = sin 93° = .99863

![img-2.jpeg](img-2.jpeg)

$$
\begin{array}{l}
b = \frac{a \times \sin B}{\sin A} \\
= \frac{12.25 \times .99863}{.0872} \\
= 140.17 \text{ MILES}
\end{array}
\quad
\begin{array}{l}
140 \\
b
\end{array}
$$

![img-3.jpeg](img-3.jpeg)

$$
\begin{array}{l}
b = 140 \times \sin 30^{\circ} \\
= 140 \times .866 \\
= 121.24 \text{ MILES}
\end{array}
$$