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PHOTOGRAPHIC EVALUATION REPORT • 

MISSION 4001 

13 JULY. 1963' 

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Project Gambit, 

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NA TlONAl IN'iffitPRETATION CENTER 
PHOTOGRAPHIC' EVALUATION" REPORT 

MISSiON 4001 ''I- . 

1 JULY1963 

T 
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GAMBIT 

.;NO FOREIGN DISSEM 

N(JICjIJ' ~~,....., 

BY -22168/64 

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PART I. PRIMARY CAMERA 

\/i-.cion \u: WIl1 

Call16ra .\0: G.l 

c'l it Width: (J.l)il~:l' 

- _____ C-\~.~- ion 4001 llsed d strip cam~raemploying 

an emirelynew sdtellite photographic sys~em. - •.• t 

The m issi on proved suc.cessfu] in that it prov ided 

larger sea le sate Hi [e photographic coverage than 

other systems presently in.ll0e. 

1. Camera Ope:r:~tior~ 1'he imagery ap,P<::ars 

slightly out oJ fOCUS, probably due to temperature 

variances cncounte't:ed the stereo mitroI'. 

Banding Occurs along therh~nor axis of the filTn 

at intervals of 12' and,24" alternately, .and is 

associated with looper 'replenishment. Imagery 

witi1in these bands is distorted by e'rratiq film 

rra\'el. f'drn speed was consistently within one 

perc'ent of the programmed spe~d except in tbe 

areas o(banding ... 

2. Image :v10ti9!1_.s:::om~.!!sati9~J2.:. lMC en .. or is 

induced by ehe loope'l' action. There is an error 

of 30- 3's pe r2ent at the begirining of the lo~per 

action, 5-10 percent in ibe cemerand 30-35 

percent at the end. The. film very quickly reverts to within one percent of its programmed 

speed upon complerion of looper replenishment 

(see film speed graphs in remarks). 

3. txposure: Exposure is adequate on the 

majority of the frames:' 110wever, exposure 

differences are apparent within stereo pairs ancJ$ 

great changes in the brightn:oss range occur on 

the long mono,,?copic frames (see den8i~y charts). 

4. Frequency Markers: Terrain imagery appears continually in the time traCk, background 

bur the [iIne ma~ks are well deflned and legible' 

th roughout the mission. 

Film -'1'."1)(': ,! !IiJ (C:i) 1 

Fi I (('r: B '" L 'l\p" Y .]() 

.\pprlurt': f' ~FJ' 

6. Yaw Slits; The exposure Was adequate; 

ho\veyer, .c~mtr'*'t was not consistently h~gh 

enough"for accurate detecfi?n or-attitude. " 

outboard 'edge of' the yaw klit on the .. e,dge of, the negative is 'I'i'gnetted 

the mission, 

7 .. Light Leaks: A malfuncrio~f the guill 

,firing, mechanism resulted in a major light leak 

.which induced ,edge fog and severe foggingofrh'(! 

outer wraps olthe film throughoutche mission, 

8. St~tic Electricity; No evidence of sta'yc 

• electricity obserVE;d. 

,9. Pi~r!.91es: Nuin~rous. throughout the mis-' 

sion.Examples: pa~s D06, fr'ames 03, 04, 07. 

10'. Abrasions an~ - Scratches': Scratches and, 

abrasions '. on both the base and tlie em,ulslon 

sides~re numerous throughout thesnisslon'. The 

most pen;;istent scratches are on the emulsion, 

,.side, 4.52" and 4.65" from and paxallel totr;e 

titled edge (exaiuple: pass D05). There are 

several eyelash-like abrasidns throughout pass 

D05, Part.icularly heavy, scratches appear,along 

the major axis of pass D06, frC\mes 05, 06, 08. 

A severe base rub, 0.3" wide, 19.1" long "is 

present on the major axis of puss D07, frame 

09. There is a small emulsion dig ev~ry 6.3", 

located 3:95" from the non-titled edge Of pass 

DOS, frame 10, In addition, there are many other 

minor scratches, abrasions, and digs. 

1 L Tearing; None 

12. 'Stains & Watermarks: There is a repetitive 

circular staiD on the emulsion side, near the 

titled edge of pass D09, frames 07, 08, 09 .. 

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GAMBIT 

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·l.dcqucr 1:-; :-;rnC:dl'e:d into the ifllai!i:: area on each 

frame: of pass UlN. There are no wart:r;-

nwrks nowel. 

IS. _ .. :, .... c .. :: . .c ... :_ ... _,\_la_t ... [_e_r: ... T~ere a rIO handling ma rks 

(flllgerprints) on pa;:;s 1)06, fr-ames and 08. 

lJepot;its of foreign mmter adhere [0 the emulsion , . 

on PdSS DU6, fr~mes Oil; and 09 .. 

16. Com~:a::;t:.. loW', -1-1/~ meciillm, high 

hmiting ::-Ien::;ity va lues). 

17 .. :\ppa 1'<':: m. Ee.sl~lu.~~l:. Fair. Ldge a'cuity is 

o~l v fali' because an out offocus condi tion exis ts ,/ 'l ~ "" 

throughout the mis::;10n; however, the .ilpparem 

resolution is enh:m'ced by the large scale of 

the phowgraphy. 

18. f\pparel1l Graininess: Fine 

19. ~h()[O (~uaiity: 1 he phOlographic qUdlhyls. 

degrade:d by an out uf fucus condiciQn that exists 

throughout the mission. The high gross fog 

caused by the guiIlotine firingrnechanism 

lilaHuncrion, also was a degrading factor. 

20."SuicabiliLL.Jc:!l' PI: Fair-to good. Linear 

measurements of approximately five feet can be 

accomplished which is comparable ro other 

satellite systems. Ground resolurion, usin'g 

vehicle size as a basis for determination, is 

estimated to be 10-15 feee, leaving considerable. 

room for improvement remarks, item 7): 

Remarks 

1. The system design allows a door in the 

vehicle to be closed between operational passes, 

protecting the interior of the vehicle from any 

exte'rior influences. Due to' a malfunction, this 

door failed.to close and a thermal problem was 

I 

encountered cau::;ed slIght distonj(~IlS in the 

stereo mirror surface. 

2. The vehicle door malfunction allowed imagery W occllr un [he film wrap-up between 

passes. Although there is an U\'1C tiHOr of approximately ±30 percent, the Glm is still usa~le 

for photo interpretation of gross features· ... 

3. .At pass' 010, ftame 1, a' vehicle 8t[iruoe 

problepl (positive roll) became apparem, resul1:ing in a cq,rl1plete loss of. imagery on pass 

D10 and degradation' of subsequent photography 

sufficiently to preclude a fair appraisal of the 

came ra perforhlance. 

4. Approximately of the tmal film rootage 

of this mission (prior to [he attitude problem) 

was expqsed in mode one.and in mode [WOo , . Mode three was not used. 

S. Uf the three stereo pail's for 

this miSSion, one was enrirely cloue! covered, 

The uthers had approximately side lap and 

'1-i% forward lap. 

6, There are 8 to 10]ungilUciinalminu':3dcnsity 

streaks that appear. intermittenriy throughout 

the mission. These arc believed to have been. 

caused by particles of dirt· in the apc;nure slit. 

7. In the areas of looper action, the 'ac~u:racy 

of ITleasuremems between' [he mission take and 

collateral material fell to approximately ±4% in 

the area of violem aC[ion, and 

of smaller film .speed errors, 

in the areas 

8. The graprls at the end of this report Illustrate 

the effects of the looper action Oil IMC. 

9. Density readings were taken on each frame 

using the Macbeth QqamaLog O€nsitometer 

Model EP 1000, with an ET 20 attachment and 

a 0.5 mm a-perture. Cross fDg >readings w@re 

taken at each end and at both sides of each frame 

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