PROJECT BLUE BOOK

| ea ae RESRED. ; ( (UNCLASSIFIED |

, (USE REVERSE SIDE OF SHEET IF MORE SPACE IS REQUIRED) ;

5. Has anomalous propagation been observed to extend the range of grourid clutter
by this radar at this site, and did this condition exist during or near the
time that unknown target was observed?

Average amount of clutter, No other unknown aircraft were in the arma,
6. What effects of rain storms and lightning have been observed on this radar?

Usual scopes weather, Nortiern Lizhts were clearly visthle during this period.

7. Were any checks made to determine if unknown target could have been one of our
own aircraft?

' Yes

8. Was any interception attempted? If so, give details.
No

9. Was a visual and/or Auditory observation made simultaneously with scope
observation? If so, give detailed description.

No
III. SPECIFIC TARGET QUESTIONS ’

1. Did any technical personnel observe the unknown target on the Radar Scope?
Have they been questioned thoroughly? What was their opinion?

Yes, interference, but of unknown origin, possible shinborne radar.

2. Was a permanent record "track" made of the target positions as they appeared
on the indicators? If so, attach to this report. (Plot on back of page 1.)

Yes, see attached report on back of page one, (1),

3. At what range, azimuth, altitude, and time was the target observed?

Negative altitude was recorded, could not train heipht finder on track
long enough to obtain altitude,

4. How did the target appear in size and shape as compared with conventional
aircraft targets?

Same as normal target.

5. Was the target of consistent size, or did it change rapidly?

Consistent .
6. Was the speed of the target constant or variable? Explain.

Constant

7. Did the target appear "fuzzy" or clear and sharp as compared with a known
aircraft target?

Sharp, very defined,

8. What other (aircraft) targets were observed in the same general area, altitude,
and time as that of the unknown target?

Track No. X-12-T Ident... VC 1429, Alt. 8,000f. Time 172% Position CC 3457,

Track No, A=-54—-T Ident. TCA #2, 11+. 17,000ft. Time 01147 Position CC 0931,
ADC Form 123 Page 2 of 3

2 Ba DOWNGRADED AT 3 YEAR INTERV ais,
DECLASSIFIED AFT2 12 YEARS.
-- . DOD DIR 5200.10

SECE

UNCLASSIFIEY,
N

(

)

= \
a

pa
“TS
PT 3

+
we,
ye

a”

4

INSTRUCTIONS: PLOT TRACK OF TARGET, INDICATE RANGE AND
AZIMUTH. GIVE TIME AT START AND END OF TRACK,

DOWNGRADED AT 3 YEAR INTERVALS;
DECLASE!!3/:D AFTER 12 YEARS.
DOD DIR 5200.10

UNCLASSIFIED

I. QUESTIONS REGARDING DETECTING RADAR EQUIPMENT

1. What type radar equipment is involved?
Ai/f 3-3 (Search)

2. Has there been any recent maintenance difficulties? If so, describe.

None

3. What type modulator (i.e., spark gap, hard tube, etc.) is used in the radar equipment?

Thyratron

4. Was the AFC (automatic frequency control) circuit of the receiver operating properly?

Yes

5. Has interference from another radar set been observed recently, and are personnel

familiar with whe effects caused by an interfering signal?

Yes

6. What type indicators, "A scope", "B scope", etc., were used to follow the target?

PFI

7. What was the radar scan rate?
5 RPM Norual. as frequently chan.ed durin, detection of unusual activity

8. What was the approximate frequency of the transmitter?

15l2nce8

1. What were the general weather conditions at the time unidentified target was observed?

II. GENERAL QUESTIONS

4 miles visibility, snow, overcast.
2. What weather data from nearby U.S. weather stations is available on temperature vs

altitude, humidity vs altitude, and wind velocity vs altitude?
OvX 01302 20 Apr. 53, E 2000 Overcast, l5mi Vie. LDP 21, Temp 51, inde Ni 6.

> Was the target observed by any other nearby radar equipments? If so, give details.

0

4. Are the operator and the supervisor familiar with the effects of anomalous (duct-

effect) propagation as they pertain to this type radar?

DOWNGRADED AT 3 YEAR INTERVALS;
DECLASSIFIED AFTER 12 YEARS:

Yes

ARC Fore + t952

DOD DIR 5200.19

Page 1 of 3

hts 23: seg] ( | ‘

) * see larry REQUIRED)
5. Has anomalous propagation been observed to extend the range of grourid clutter (

by this radar at this site, and did this condition exist during or near the
time that unknown target was observed?

iver_ae anount of clutter. No other un«nown aircraft were in she area

6. What effects of rain storms and lightning have been observed on this radar?
Unusual scops weather, Northern Lights were clearly visiile durin, tiis period.

7. Were any checks made to determine if unknown target could have been one of our
own aircraft?

Yes

8. Was any interception attempted? If so, give details.
No

9. Was a visual and/or Auditory observation made simultaneously with scope
observation? If so, give detailed description.
No

III. SPECIFIC TARGET QUESTIONS

1. Did any technical personnel observe the unknown target on the Radar Scope?
Have they been questioned thoroughly? What was their opinion?

Yes, interference, but of unknown origin, poss-ible shipborne rader.

2. Was a permanent record "track" made of the target positions as they appeared
on the indicators? If so, attach to this report. (Plot on back of page 1.)
Yes, see attached report on back of page one, (1).

3. At what range, asimuth, altitude, and time was the target observed?

Negative altitude sas recorded, could not train neizat fincer on track
long enouzh to obtain altitude.

4. How did the target appear in size and shape as compared with conventional
aircraft targets?

Sane as normal target.

5. Was the target of consistent size, or did it change rapidly?
Consistent

6. Was the speed of the target constant or variable? Explain.
Constant

7. Did the target appear "fuzzy" or clear and sharp as compared with a known
aircraft target?

Sharp, very cefined.

8. What other (aircraft) targets were observed in the same general area, altitude,
and time as that of the unknowm target?

Track iio. X-12-T Ident. VO 1489 Alt. 8 ,000f t Time 01122 Fosition Uv 4657.
"

Track No. A-66-T Ident. TCA # 2 Alt. 17,000ft Time 01142 Position cv 0981

ADC Form 123 Page 2 of 3
20 October 1952

Indicate
Ranges
In Miles ©

INSTRUCTIONS: PLOT TRACK OF ET, INDICATE RANGE AND
AZIMUTH. GIVE TIME AT START AND END OF TRACK,

( ADC Form 123 ; Page 3 of 3

rue -747F

TF aS FO a PP
; BSERVATION DATA SHEET
Ce UNCLASSIFIED
I. QUESTIONS REGARDING DETECTING RADAR EQUIPMENT
1. What type radar equipment is involved?
AN/FP3-3 (Search)

2. Has there been any recent maintenance difficulties? If so, describe.
None

3. What type modulator (i.e., spark gap, hard tube, etc.) is used in the radar equipment?
Thyratron

he Was the AFC (automatic frequency control) circuit of the receiver operating properly?

Yes

5. Has interference from another radar set been observed recently, and are personnel
familiar with whe effects caused by an interfering signal?

Yes
6. What type indicators, "A scope", "B scope", etc., were used to follow the target?
FPI
7. What was the radar scan rate?
5 RPM Normal. \ias frequently changed during detection of unusual activity.
8. What was the approximate frequency of the transmitter?

1512 mcSe

—

II. GENERAL QUESTIONS

1. What were the general weather conditions at the time unidentified target was observed?
5 wiles visibility, snow, overcast.

2. What weather data from nearby U.S. weather stations is available on temperature vs
altitude, humidity vs altitude, and wind velocity vs altitude?

CMX 0130Z 20 Apr 53. E 2000 Overcast, 15mi Vis., DP 21, Temp 5l, sinds hw &.
3. Was the target observed by any other nearby radar equipments? If so, give details.
No

4. Are the operator and the supervisor familiar with the effects of anomalous (duct-
effect) propagation as they pertain to this type radar?

Yes “FSS,
DOWNGRADED AT 3 YEAR INTERVA OF
BRC ober 1952 te _

UNCLASSIFIED

Bh thes L we | i he

° : 4 : r tus r bore _ hy . ;
r . e- ee 1. Sew 3

(USE REVERSE SIDE'OF SHEET IF MORE SPACE IS REQUIRED)

5. Has anomalous propagation been observed to extend the range of grourid clutter ( |
' ‘by this radar at this site, and did this condition exist during or near the | ’
time that unknown target was observed?

Avorace auount of clutter. Ao other unknown aircraft were in the ares.

6. What effects of rain storms and lightning have been observed on this radar?
Usueual scope weather, Northern Li.hts were clearly vislbie aurin. tnis period,

7. Were any checks made to determine if unknown target could have been one of our
own aircraft?

Yoa

8. Was any interception attempted? If so, give details.
‘To

9. Was a visual and/or Auditory observation made simultaneously with scope :
observation? If so, give detailed description.

lo
III. SPECIFIC TARGET QUESTIONS

1. Did any technical personnel observe the unknown target on the Radar Scope?
Have they been questioned thoroughly? What was their opinion?

Yes, interference, but of unknown ori-in, possible shipborne radar.

2. Was a permanent record "track" made of the target positions as they appeared
on the indicators? If so, attach to this report. (Plot on back of page 1.)

Yes, sec attached report on back of page one, (1).

3. At what range, azimuth, altitude, and time was the target observed?

Nevative altitude was recorded, could not train hei.nt finaer on track
long enoush to obtain altituce,

le How did the target appear in size and shape as compared with conventional
aircraft targets?

Same as norzal target.

5. Was the target of consistent size, or did it change rapidly?
Consistent

6. Was the speed of the target constant or variable? Explain.
Constant

7. Did the target appear "fuzzy" or clear and sharp as compared with a known
aircraft target?

Sharp, very defined.

8. What other (aircraft) targets were observed in the same general area, altitude,
and time as that of the unknowm target?

Track No. K-12-T Ident. VC 1489 Alt. 8,900 ft. Thane 01122 Position Co 5 )/

Track No. A-65-T Ident. TCA # 2 Alt. 17,000ft. ‘Time 01142 Position Cu 9961.

ADC Form 123. : Page 2 of 3
20 October 1952

=- —— —— 7 7 a

Indicate
Ranges
In Miles

INSTRUCTIONS: PLOT TRACK OF TARGET, INDICATE RANGE AND
AZIMUTH. GIVE TIME AT START AND END OF TRACK,

ADC Form 123 Page 3 of 3
20 October 1952

_

NN ee ee ae ee oe

by the 665th AC&W Squadron, Calumet, Michigan. The plots originated approxi-
ma

Calumet, Michigan

I. DESCRIPTION
On ©O April 1953 between 01162 and 02152 a series of targets were sighted

tely 50 miles from their station, from 050 clockwise to 251°. Speed was
from 1800 mph to 8400 mph. Thies sighting was o radar sighting only and appeared
es @ normal target except for speed. Nb abrupt maneuvers were noted. Several
individual targets were noted. This squadron was using an AN/FPS-3 type search
reader unit, with a Thyratron modulator. There had been no maintenance diffi-
culties. The general weather conditions at the time of sighting were three
miles visibility, snow and overcast. Worthern Lights were clearly visible
during this period.

' II. DISCUSSION

This is another of the better type of FLYOERPT. The intelligence officer
is to be commended for the initiative shown in making as complete ao report as
was possible under the circumstances. He made the preliminary evaluation at
the time he prepared the yee saving Project Blue Book the time and effort
it takes to investigate a sighting of this type. His evaluation was ..», » |
"Targets are believed to be interference from shipborne radar, originating on
Lake Superior”.

IIZ. CONCLUSION
Other (rader interference).

DOWNGRADED AT 3 yra
DECLASSIFIED AFTER 15 ven ms
DOD DIR 5200.10

UNCLASSIFIED | 753-7362

me Rui: = G8, Als
“ly HEADQUARTERS
aly Dy AIR DEFENSE COMMAND 2 92.
\\y ENT AIR FORCE BASE (Daze)
COLORADO SPRINGS, COLORADO
UNCLASSIFIED :
ADDRE 31961 S35 thy = a,
4 }
SUBJ&CT: (Restricted) Report of Unidentified Flying Objects 4” * bo
" \ :
n’ a
TOs Comnander \ «
Air Technical Intelligence Center — 44 yr
ATTN: ATIAA-20 oe
Weight Patterson Air Force Base, thio a

In accordance with Air Fores Letter 200-5, 2) April 1952, the
inolosed report of unidentified flying objects (AF Form 112) is

forwarded for your information.

FOR THE COMMANDER:

1 Inel
AF Form 112 Parts I
& II, subj: Rept
Unidentified Flying
Objects, dtd 20 Aor 53

7) AT 3 VEAR INTERVALS;
DOWN GR ASSIFIE! ‘ty AFTER 12 YEARS.
DOD DLR 5200.10

If tha < bs 1
(or net o Pec soa of

Webs Corres. wOnUcgRSe £3 Covn sd to

ae a as 4s accordance “with ar
} Q5E-ATR 205-1 Ps

UNCLASSIFIED

/
7

-
Fb3- FSISO

:
Die
APPROVED | JUNE t968

tal PC CLAM he (LEAVE BLANK)
BR USA... USAP. :

AIR INTELLIGENCE INFORMATION REPORT

a) FLYOBRT

! ’ ; raom (A : ‘
(2). Neeveonaw Penineula, Michigan (6) 665TH 4049 Squadron, Unlunet, -ichi.an

TE OF INFORMA — oo . >
| (2) 29 April 1955, le 20 April 1953 (h) Be2

PREPARED BY (Ofte) SURG
(i)Capt. Russell fi. Kline, Iuéel. Officer C3) "Personnel 6557H Ad Squadron"

se ee dtd. 134 serch 1454

a
\k) Jtillzation of Af Fora 112, aFL 200-5, sc0 Fora 1e5, cP itre, LAGLii 513.1
SUMMARY: (Enter concies summary of report. Give significance in final one-sentence paragraph. List inclorures at lower left. Begin text of report on AF Form 114—Part I/)

See Sect., (j) above for source:
Roferences SALF Litre, ZAQIN J5lU.1 dtd. 19 ‘areh 1955 vara. (3)

vhilef Controller Capt. Janes i. Dor an, 565th ACwt Jqdne, Valusot, Aleni.an
nadar Observer ry, tilly F. Conway, OO9th Acs Gqdn., valuvet, Hichivan
‘adar Ubseerver A/2e Richard G. iietriek, 665th ACui Jqdne, Valunet, .lchian

(L) suumarys On 20 April 1953 between 2018 “ST and 2115 unt a cerien £ tar_eta were
si:chted by the 665th ACE Squadron, Calumet, -ichiuan. +e lots orl_nute
ap roxiuately 50 miles out from the station, froa 050° clockwise to 251°.
Speed vas frow 1800 ailes per hour to 8,400 ailes per hour. ‘Tur ete are

belioved to be interference from salpborne radar, orzloating on Lake
Superior.

Intellizence Officer

1
RO Data Sheet WNGRADED #T > YEAR INTERVALS;
DON ECLASSIFTED A¥TER 12 YEARS.
DOD DIR 5200.10

in accordance with ab? Lir., dtd. LS .areh 1904, cara 2Be

Orig. ind 2 cy = Udy LADF, Stewart AFD. Attn: Director of Intelligence.

“é Belleville, Michi.an
hae + Steer 4+ ahetetane Vite Sas ahs Llrester ot Lateliicences

: AS AMENDED. TES TRANSMISSION OR THE REVELATION OF ITS CONTENTS IN ANY MANNER TO AN UNAUTHORIZED PERSON IS PRowibitin Sr Bn
3 AY NOT BE REPRODUCED IN WHOLE OR IN PART, BY FORCE AGENCIES, EXCEPT ISSION RECTOR

ee tec cae

eS Tea

AF FORM 112 (

APPROVED | JUNE 1948 ett? te .

COUNTRY PORT LT < ] (LEAVE BLANK)
{1) UeSede ( )

AIR INTELLIGENCE INFORMATION REPORT 7
Repses of Unusual Flying Objects |

i
—— ——_—

~~

655th. AO&d Sarai Calumet, Michigan
(

(8) EVALUATION

9) Bao
(10) Capt. Russell H. Kline, Intel. Officer | (11) "Personnel 665th ACkW Squadron”
REFERENCES (Coniral number, directioe, precious report, ee., os applicabli) a eee
(12) Utilisation of sF Porm 112 (Air Intellizence Information Report)?orm 123
SUMMARY: (Enter concioe summary of report. Give significance in final one-sentence paragraph. List inclowuree at lower left. Begin text of report on AF Form 119—Part 11.)

(14)(Sumaary) |
See Sect 11 = Uapt. James i. Lorzan, 565th AC&W Squadron, Calumet, dilchizan
Phone 351 or & Chief Vontroller
4/20 Richard G. Hetrick, 665ta ACW Sqdn., Calumet, diichizan
Phone 21 or 8 Radar Oheerver
A/le Billy 7. Coney, 665th AC&W Squadron, Calumet, Michizan
Phone 21 or 3 Radar,Obeerver
Crew Chief.
On 20 April 1953 between 01182 and 02152 a series of tarzeta were sizhted
by the 665th AC&W Squadron, Calumet, Michigan. The plots orginated aporoxinately
50 miles out from the station, from 050° oloclarise to 251°. Speed was from 1200

miles per hour to 8,400 miles per hour. Tarzeta are believed to be interference
from shipborne radar, orzinating on Lake Superior.

—_——

The following information is the track numbers and respective plote.

TRACK TRACK
TI (3) Georst Coord. 3) TIMé Georef—Yoord. ii
20 Apr 53 480118 2 DD 5013 T-leT 0121230 DO 2122 L-2—T
ED oo19 bs bs 4012
ED 1212 glic2. bo 5921
ED 7019 0122:30 sO 1510
uD 4919 BO 5115
FD 0015 0123 Le 4805
FD 1315 , 0124:15 FO 0900
0119230 FD 2920 Fade - 0123330 FB 2555
ra 4951
0124 GB 1540 Pade
01252 EB 0027 T-3-T  O127 DB 0330 Tale T
0125315 EB 2114 0127315 DB-1109
kc EB 3800 0127130 DB 4905
0125: BA 5551 0128 EA 0538
0128200 PA 1041 0128915 Za 1554 |
0126315 FA 2931 Fade 0128:45 =A 5713 Fade
yh DOWNGRADED AT °? YEAR INTERVALS;
LASSIFIED AFTER 12. YEARS.
ee —_ DOD DI 5200.20

1 cye- Director of Intelligence, Headquarters USAF, Washington 299 Dee
1 cys=- Chief, Air Technical Intel. Center, ATTN: ATIAA-26 ‘iright-ratterso

Peron BY MMH, Eat Ava, Attn? Deputy for Intellizence

- iG, SADY, Stewart AFB, Attn: Direotor of Intellizence 7 Director c
: - - ri Z0th A r Division, dillow Run Airport, nes sert- itr Michigan Ones yeees
1 oy - tnto CY e» Hostn Air Mef WG. ATlNs Direotor of Intelligence

NOT# THIS DOCUMENT CONTAINS INFORMATION AFFECTING THE NATIONAL DEFENSE OF THE UNITED STATES WITHIN THE MEANING OF THE ESPIONAGE ACT, 50 U.S. C.—~
31 AND 22, AS AMENDED, ITS TRANSMISSION OR THE REVELATION OF ITS CONTENTS IN ANY MANNER TO AN UNAUTHORIZED PERSON IS PROHIMITED BY LAW.
IT MAY NOT BE REPRODUCED IN WHOLE OR IN PART, BY OTHER J TAP STALESvAIiRgFORCE AGENCIES, EXCEPT SY PERMISSION OF THE DIRECTOR OF

mS

. .

AF FORM 112—PART Il
APPROVED | JUNE 168

AIR INTELLIGE ON REPORT

o . ji aT
Valuset, Michigan

‘Paragraph o of

AFL 200-5 Gon't

4, Radar Observation wae wade at 47° 23' Fi 88° 10' #. Altitude- Unknown,
Listance was from 50 Miles out of the station to 200 niles out, clockwise

around the

station.

De Targets were unidentified. -xperilence of .adar Observersay tilly &. Conway,
A/le AF 15298169, 3 Yeare in iiadar Operations. SNichard U,. lietriok, A /2e
AP 13364788, 2 1/2 years in Sadar Operations.

Witness:

6. Weathers

John Gebo, T/S0T. AF 21264191, Experience: 4 Years in Hadar
Maintenance.

Houghton County Airport located 19 miles from station during this
period was

Estimated 2000 ft. Overcast, 15 Miles visability,

DP 21, temp. 31, sinds were fron the North Jest at

8 Knote per hour. winds aloft were unknown.

7- Meteorological conditions were: Nothern Lichts were clearly visible during

this period. iio other information known of.

&. No photographs were taken, no Scope camera available. io physical evidence

avallable.

9. No Interception action taken, due to no fighters aasizned to this squadron.

10. Location of other air traffic in the area at the tiaes

A-66-T

X=12=T

INTELLIGENCE, USAF,

IDENT. ALTITUDE TIME POSITION UBOREF
TCA #2 17,000 2014 us? cc 0918
vo dhe 8,000 2012 usT CO 3657

DOWNGRADED AT 3 YEAR INTERVALS;
DECLASSIFIED AFTER 12 YEARS,

UNCLAS SIFIED. DOD DIR 5200.10

NOTE: THIS DOCUMENT CONTAINS INFORMATION AFFECTING THE NATIONAL DEFENSE OF THE UNITED STATES WITHIN THE MEANING OF THE ESPIONAGE ACT, 50 U. S.C.—
3) ANO 32, AS AMENDED. 1S TRAREEEEION OF VAS RELATION OF SVE CONERNTS 1 Bie MANNER TO Al UMAUTIIORSERD PERSON IS PROHIBITED BY LAW,
IT MAY NOT BE REPRODUCED IN WHOLE OR IN PART, e Ph mS

eS AIR FORCE AGENCIES, EXCEPT BY PERMISSION OF THE DIRECTOR OF

16—B5570-1 —U. &. GOVEANwENT Painting orrics

ot ae

a mmmmmmmmmmamsssssssssssssss————————____——____—

>

(
AF FORM 112—PART It cet cel
APPROVED | JUNE 1948

AIR INTELLIGEN E INFORMATION REPORT

Calumet, iM Hichigas

aT

seins 2

We.
e followin, information is the track numbers and respective plots.
20 April 1955 TRACK LAGK
tLe G3 J C « NO This (use CUURLF UOURD. OQ,
2918100 DD 5013 T+1-T 2021330 Ww 2122 T-2-T
LD 9019 pe 4012
ED 1212 2022100 Le 5y2l
LD 3019 2022 2 30 BG 1510
nb 4019 BG os
*D 0016 2023200 BU
Yb 1315 2023+15 FG ape
FD 2920 Fade 2023330 FB 2555
i's 4951
2024300 JB 1540 Pade
2025300 43 0027 T=3-T 2027 200 v3 0830 T—4-'7
2025115 B 2114 2027215 LB 1109
2025140 38 4800 2027250 LB 4905
2025345 BA 5951 2028300 nb 05
2026:00 . FA 1041 2028215 WA 1554
‘* 2026815 FA 2931 Fade 2028:45 uA 37135 Fade
2029 :00 - CB 2115 T5-T 2031:00 UB 0015 T-S=f
202920 CA 3158 2031220 CA 0052
came CA cee 20451245 BA 5527
2029: CA 20423100 BA 5000 Fade
2030100 CA 4500 Fade
2052 245 BB 4507 T-7=T oth Ba 1112 T-3-T
2033300 BA 3045 20348 AA 5851
20535315 BA 1520 2035100 AA 5527 Fade
2035:%0 BA 1500 Pade
2038100 AB 2527 T-10=T
209331 AB 0032 T-9=T 2038320 QB 4115
2036100 Qs 3110 aoe QB 1408
2036315 AS 0550 2038145 SA 2952 Pade
re ao CA 5532
2036145 Qa 5918 Fade —e Aa 4050 T-12-T
- 20443 AA 0515
2039100 AB 1045 T-11-T 2045 100 GA 4500 Fade
2059215 PS 3829
2039 345 ¥3B 0020 Fade
2045 320 AB 4905 T-13-T 2114:45 bB 55521 T-14-T
2045 145 AA 0045 2115300 £5 1115
2046100 QA22920 Pade ’ 2115215 FA 0450 ade

In accordance with AFZ 200-5 Paragraph co, dtd 20 April 1952, the following

information is subsitt<d.
l. Radar sicshting only, appeared as

a normal terzet except for speed.
abrupt maneuvers were noted.

Several individual tar :ete were noted.

0

Tine of eizhting was between 2018 {YT and 2115515 SST on 20 April 1953.

 HapeRiaas hibit? *BeS NOE PAPAL ARPES AS" gekveeo es Pe aa) Oy ¢BPe

NT asl Caan DiMinL axmnens fa amsonaab on Tou nercounen ACT. U.S.C.~
31 AND 32, AS AMENDED. ITS TRANSMISSION OR THE REVELATION OF ITS CONTENTS IN ANY MANNER TO AN UNAUTHORIZED PERSON IS PROHIBITED BY LAW.

IT MAY NOT DE REPRODUCED IN WHOLE OR IM PART, BY OTHER THAN UNITED STATE ees inree ryan ALSS

DECLASSIFIED AFTER 12 YEARS.

20

DOD Dik 5200.10

16—55470-1

SEG -PEIS-

-#

_ ahs Os

> pay
AF FORM 112—PART It |
APPROVED | JUNE 1968.

: aie |
ns

thal atti REPORT

665. AOS Squad
_— iehtesa. | wa a a =
‘Iva (2) Ueoret Ooord. TRAC ra (2) Georet Coord uu ; 3 a ead
0129 sO 215 2 013. «so 0015 =~
0129120 OA 3158 0131120 CA 0052
0129330 «(CA £928 0131:45 3=BA 5527
0129 345 4 4112 0132 BA 5000 Fade
} 0130 CA 4500 Fade
0152045 BB 4507 T-7-T 0134) BB 1112 T-8-T
0133 BA 3045 ra ha 5851
0133115 BA 1520 0135 AA 3527 Fade
0133:30 Ba 1500 “Pade
0138 AB 1527 T-10-T
01395:45 AB 0032 T-9-T 0138:20 @ 4115
0136 QB 3110 0138: QB 1408
0136115 Aa 0550 013808 AA 2952 Fade
QA36130 QA 3532
0136:45 Ss Ga «C5918 Pade 0139 AB 1045 T-ll-?
0139325 PB 5829
0139245 PB 0020 Fade
ne 0 Aa 4050 Bol 2-P
O14, AA 0515 0145320 8 AB 4905 T<13-T
0145 Qa 4500 Fade 0145345 =A 0045
0146 QA 2920 Fade
0214245 DB 5331 T-14-T
0215 ‘EB 1119
0215315 Fa 0450 Fade

In ascordance-with APL 200-5 Paragraph o, dtd 20 April 1952, the following
information is subaitted.

le. Radar sighting only, appearet as a normal tarzot except for speed. No
abrupt maneuvers were noted. Several individual targets were no

2.- Time of sighting was between 01182 and 6215:15 on 20 April 1953.

3. Manner of sizhting was Slectronic, Speed was between 1600 mph to 8,400mph
depending on the target. Type aircraft was unknown, targets believed to be
interference from shipborne radar.

4, Lecation of Observervation wae at the 665th AC&# Squadron Operations.
5. Experience of Radar Observers: CO@nway, Billy F. A/lc aviseseiso 3 Years
experience in radar operations. Hetrick, Richard G. A/2e AF13364788,

2 and 3/2 years-in radar operations, Gebo, John 7/SOQT AF 21284191, 3 Yre Radar Mai
6. Weather 19 Miles from station, & 2000ft Overcast 15 Hi Vie. DP 21 Temp 31
Winds from the North vest at 8 Knots.

q- Northern lizhts were clearly visible during this period.
© photographs were taken, no physical evidence taxsen.
~ No interception action taken, due to no fighters assizaed to this Squadron

10. Lecation of other air traffic in the area at the time:

Track no. A-O6-T Ident. a ALT. 17,000ft. Time. 01142 Position. CCO9lE
Track noe X-12-f. Ident. YCl ALT. 8,000f£t. Tize. 01124 Position 003657.

DO SADED AS at 3 YEAR INTERV "1
1S, Sanchotle

TaN 5200.10 Captain, ~ UeAy

Intellizence Officer

UNCLASSIFIED

NOTE; THIS DOCUMENT CONTAINS INFORMATION AFFECTING THE NATIONAL DEFENSE OF THE UNITED STATES WITHIN THE MEANING OF THE ESPIONAGE ACT, 50 U.S. C.~
31 AND 32, AS AMENDED. ITS TRANSMISSION OR THE REVELATION OF ITS CONTENTS IN ANY MANNER TO AN UNAUTHORIZED PERSON IS PROHIBITED BY LAW.

IT MAY NOT BE REPRODUCED IN WHOLE OR IN PART, ae ee eee eee an eee SO mane CAOINT BY PRIAERIGN OF Tie DIRECTOR OF
INTELLIGENCE, USAF,

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Be ee ober 4952

. RADAR OBSERVATION DATA SHEET

UNCLASSIFIED

I. QUESTIONS REGARDING DETECTING RADAR EQUIPMENT

What type radar equipment is involved?
AN /FPS<3 (Search)

Has there been any recent maintenance difficulties? If 50, describe.
None

What type modulator (i.e., spark gap, hard tube, etc.) is used in the radar equipment?
Thyratron

Was the AFC (automatic frequency control) circuit of the receiver operating properly?
Yes

Has interference from another radar set been observed recently, and are personnel
familiar with whe effects caused by an interfering signal?

Yes

What type indicators, "A scope", "B scope", etc., were used to follow the target?
PPI ,

What was the radar scan rate?

5 RPM Normal. Was frequently changed during detection of unusual activity.
What was the approximate frequency of the transmitter?

' 1312 mes

II. GENERAL QUESTIONS

What were the general weather conditions at the time-unidentified target was observed?
3 miles visibility, snow, overcast.

& weather data from nearby U.S. weather stations is available on — vs
altitude, humidity vs altitude, and wind velocity vs altitude?

CiMX 01307 20 Apr 53. E 2000 Overcast, 15mi. Vis. DP 21, Temp, 21, “4nds Nw PR,

Was the target observed by any other nearby radar equipments? If so, give details.
No

t

Are the operator and the supervisor familiar with the effects of anomalous (duct-—
effect) propagation as they pertain to this type radar?

Yes

§ YEAR INTERVALS»
DORE LASSIFIR AFTER 2¢ YEARS
“POD DIR 5200.10 — oT tenue §

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