File:Echo inflation test.jpg
Original file (2,533 × 2,346 pixels, file size: 631 KB, MIME type: image/jpeg)
Captions
Summary[edit]
Camera location | 36° 13′ 48″ N, 76° 07′ 48″ W | View this and other nearby images on: OpenStreetMap | 36.230000; -76.130000 |
---|
DescriptionEcho inflation test.jpg |
English: Static inflation test of 135 foot satellite in a blimp hangar at Naval Air Station Weeksville, North Carolina (a World War II antisubmarine blimp base). The National Aeronautics and Space Administration 100-foot-diameter satellite, designed by the Space Vehicle Group of the NASA Langley Research Center and constructed by General Mills of Minneapolis, Minnesota, was shown during ground inflation tests in 1959. Suspended from the ceiling of a hangar the sphere, named "Echo." was inflated by use of a blower connected to the satellite by a hose. Forty thousand pounds of air was required to inflate the sphere on the ground, while in orbit it only required several pounds of gas to keep it inflated. Echo was a passive communications satellite which reflected radio and radar signals as a limited communications relay. It was also used, over a period of time and with accurate tracking, to plot the variations in air density at the top of the atmosphere by following the vagaries of its orbit. With a weight of 150 pounds, the satellite was inflated in space. It did not have a rigid skin and accordingly was used at high altitudes where it would be subjected to negligible aerodynamic drag force. To keep the sphere inflated in spite of meteorite punctures and skin permeability, a make-up gas system using evaporating liquid or crystals of a subliming solid were incorporated inside the satellite. |
Date | |
Source | http://nix.ksc.nasa.gov/info?id=EL-1996-00052&orgid=1 |
Author | NASA Langley Research Center (NASA-LaRC) |
Other versions |
This image or video was catalogued by one of the centers of the United States National Aeronautics and Space Administration (NASA) under Photo ID: EL-1996-00052. This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing. Other languages:
العربية ∙ беларуская (тарашкевіца) ∙ български ∙ català ∙ čeština ∙ dansk ∙ Deutsch ∙ English ∙ español ∙ فارسی ∙ français ∙ galego ∙ magyar ∙ հայերեն ∙ Bahasa Indonesia ∙ italiano ∙ 日本語 ∙ македонски ∙ മലയാളം ∙ Nederlands ∙ polski ∙ português ∙ русский ∙ sicilianu ∙ slovenščina ∙ Türkçe ∙ українська ∙ 简体中文 ∙ 繁體中文 ∙ +/− |
Licensing[edit]
Public domainPublic domainfalsefalse |
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:
|
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 05:46, 14 December 2011 | 2,533 × 2,346 (631 KB) | Spideog (talk | contribs) |
You cannot overwrite this file.
File usage on Commons
The following 3 pages use this file:
Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
JPEG file comment | Imported from PNM image: EL-1996-00052.tmp.pnm |
---|