File:330-PS-3256 (45898 AC) (17204655228).jpg

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Summary[edit]

Summary
Description	330-PS-3256 (45898 AC): Indian Springs Air Force Base, Nevada, April 20, 1952. Exact weather information is a prime necessity during atomic test periods. To obtain information concerning air pressure, temperature and humidity, these captive, helium-filled “Kytoon” balloons, as shown here, are supplied by the USAF’s Air Weather Service during the Atomic Energy Commission’s periodic atomic tests at the Nevada Providing Grounds. Kytoon Balloons are sent aloft before each nuclear test, and are hauled down minutes before the actual detonation occurs. Last minute weather information is thus relayed by remote control to the A.K.C. Test Director at the Proving Grounds Control Point. Such data is used to predict subsequent paths of radio-active clouds through the atmosphere. Photograph released March 16, 1953. (5/5/2015).
Source	Wikimedia Commons file page
Author	National Museum of the U.S. Navy
Permission	See original Commons license details.

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	02:09, 7 June 2026		2,204 × 2,725 (1,006 KB)	Maintenance script (talk \| contribs)	== Summary == Importing file

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Nuclear weapons testing

Metadata

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Camera manufacturer	NIKON CORPORATION
Camera model	NIKON D80
Exposure time	1/320 sec (0.003125)
F Number	f/9
ISO speed rating	1,600
Date and time of data generation	10:34, 5 May 2015
Lens focal length	19 mm
Width	3,872 px
Height	2,592 px
Bits per component	8 8 8
Pixel composition	RGB
Orientation	Normal
Number of components	3
Horizontal resolution	300 dpi
Vertical resolution	300 dpi
Software used	Adobe Photoshop CS6 (Windows)
File change date and time	10:40, 6 May 2015
Y and C positioning	Co-sited
Exposure Program	Not defined
Exif version	2.21
Date and time of digitizing	10:34, 5 May 2015
Meaning of each component	Y Cb Cr does not exist
Image compression mode	4
APEX shutter speed	8.321928
APEX aperture	6.33985
APEX exposure bias	0
Maximum land aperture	4 APEX (f/4)
Metering mode	Pattern
Light source	Unknown
Flash	Flash did not fire, compulsory flash suppression
DateTime subseconds	20
DateTimeOriginal subseconds	20
DateTimeDigitized subseconds	20
Supported Flashpix version	1
Color space	sRGB
Sensing method	One-chip color area sensor
File source	Digital still camera
Scene type	A directly photographed image
Custom image processing	Normal process
Exposure mode	Auto exposure
White balance	Auto white balance
Digital zoom ratio	1
Focal length in 35 mm film	28 mm
Scene capture type	Standard
Scene control	High gain up
Contrast	Hard
Saturation	Normal
Sharpness	Normal
Subject distance range	Unknown
Serial number of camera	3073408
Lens used	12.0-24.0 mm f/4.0
Date metadata was last modified	06:40, 6 May 2015
Unique ID of original document	D874820C139A67273CB5C95406EDC882
IIM version	25,111