File:Engineers Clean JWST Secondary Reflector with Carbon Dioxide Snow.jpg

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Original file ‎(4,546 × 2,989 pixels, file size: 2.07 MB, MIME type: image/jpeg)

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Summary

Description

English: Engineers in a clean room, using CO2 snow to clean a gold-coated test mirror for the James Webb Space Telescope

Date

22 January 2015, 11:38:56

Source

https://www.flickr.com/photos/gsfc/17402277412/in/photostream/

Author

NASA/Goddard/Chris Gunn

Chris Gunn

	Description	American photographer
	Authority file	: Q110278636

Licensing

	This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
	Warnings: Use of NASA logos, insignia and emblems is restricted per U.S. law 14 CFR 1221. The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not necessarily in the public domain. Materials based on Hubble Space Telescope data may be copyrighted if they are not explicitly produced by the STScI.[1] See also {{PD-Hubble}} and {{Cc-Hubble}}. The SOHO (ESA & NASA) joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use. [2] Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. [3] The National Space Science Data Center (NSSDC) site has been known to host copyrighted content. Its photo gallery FAQ states that all of the images in the photo gallery are in the public domain "Unless otherwise noted."

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	18:33, 23 September 2015		4,546 × 2,989 (2.07 MB)	Swpb	User created page with UploadWizard

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The following 2 pages use this file:

Metadata

This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.

If the file has been modified from its original state, some details may not fully reflect the modified file.

Camera manufacturer	NIKON CORPORATION
Camera model	NIKON D4S
Exposure time	1/100 sec (0.01)
F Number	f/4
ISO speed rating	800
Date and time of data generation	11:38, 22 January 2015
Lens focal length	52 mm
Orientation	Normal
Horizontal resolution	300 dpi
Vertical resolution	300 dpi
Software used	Adobe Photoshop CC 2014 (Macintosh)
File change date and time	11:23, 29 April 2015
Exposure Program	Manual
Exif version	2.21
Date and time of digitizing	11:38, 22 January 2015
APEX shutter speed	6.643856
APEX aperture	4
APEX exposure bias	−1.6666666666667
Maximum land aperture	3 APEX (f/2.83)
Metering mode	Pattern
Light source	Unknown
Flash	Flash did not fire
DateTime subseconds	64
DateTimeOriginal subseconds	64
DateTimeDigitized subseconds	64
Color space	sRGB
Focal plane X resolution	1,368.888885498
Focal plane Y resolution	1,368.888885498
Focal plane resolution unit	3
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	Manual exposure
White balance	Auto white balance
Digital zoom ratio	1
Focal length in 35 mm film	52 mm
Scene capture type	Standard
Scene control	Low gain up
Contrast	Normal
Saturation	Normal
Sharpness	Normal
Subject distance range	Unknown
Serial number of camera	2014230
Lens used	24.0-70.0 mm f/2.8
Rating (out of 5)	0
Date metadata was last modified	07:23, 29 April 2015
Unique ID of original document	DAD5FD51FAC1A2AB1AAEA7F92EDBD4B0

File:Engineers Clean JWST Secondary Reflector with Carbon Dioxide Snow.jpg

Summary

Licensing

Captions

Items portrayed in this file

depicts

copyright status

public domain

inception

22 January 2015

captured with

Nikon D4S

media type

image/jpeg

ISO speed

800

exposure time

0.01 second

f-number

4

focal length

52 millimetre

File history

File usage

Metadata