A 
EA 
2255 DA OST POST ES ST 
  
CS SEEN LA AM ET il ren Lado Mor ii Dui Ade cas CNT NS UT 
Temperature change along camera (30-409C) 
Propellor/Air Turbulance 
Smoke/Haze/Dust Storms 1 
Hot spots 
Window quality inferior 
— ND NO — 
In addition a few answers are quoted directly: 
"The normal exercise of TLC (tender loving care) is all that is required to 
keep camera equipment operating at maximum efficiency without going to 
climatically controlled aircraft" (It is hoped that this respondee will 
read this report). 
"Warm air from engine hence our interest in suitable modifications. A 
record of air temperature and camera port temperature is kept. Prelimi- 
nary calculations indicate this has little effect on geometry but serious 
affect on quality (of imagery). We undertake lens calibration with a 
goniometer under laboratory conditions and have been interested in labora- 
tory and test area conditions for some time." 
"Although a certain amount of vibration must be present we find that 
mounted in the Wild PAVZ Universal mount, vibration of the camera body 
at time of photography is virtually nil. We have also tested for tempera- 
ture gradients in the air just below the camera lens but find that due 
to the flow of air, the air beneath the lens is free of any hot air from 
the exhaust, emissions, etc. Although, some distance away, on either side, 
there is a significant temperature gradient." 
"Yes, the humidity differences between central Anatolia and other air 
fields located seaside. Generally missions are far from our center and 
quite large, so we are located for a few weeks at this humid airfield. 
Then geometric accuracy is affected." 
Analysis of Answers to Questionnaire 
  
Respondees: 
There were 73 respondees to the questionnaire coming from fifteen different 
nations. Forty answers come from survey companies, eight from highway 
agencies, nine from military agencies, twelve from civilian government 
agencies other than highways, four were not identified in these catagories. 
The sampling and distribution were such as to provide a satisfactory level 
of confidence in the answers provided. 
Cameras: (Question 1). There are old and modern mapping cameras in the 
143 units reported. There are also a few modified aerial reconnaissance 
cameras. The majority of cameras employ the 23 X 23 cm format. 90% of 
the quantity reported are manufactured by Wild and Zeiss. It is obvious 
that a large number of military cameras are not reported. There are modern 
Fairchild and Itek mapping cameras which are not included. The sampling 
and distribution is nevertheless good. 
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