IMAGE
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The picture reproduced on the x-ray film or by other radioimaging methods such as ultrasonography.
- i. amplifier system — includes amplifer and viewer or television camera and tape player.
- i. display modes — see ultrasonography, A-mode, B-mode and M-mode.
- i. formation — exposure of the film to the x-ray beam ionizing radiation or to other radiant energy forms causes ionic changes in the silver bromide crystals in the film emulsion so that it acquires a silver atom. It is the deposition of reduced silver atoms in particles or zones that causes the black zones or foci on the film. The amount of silver deposited depends on the intensity of the initial radiation x-ray exposure.
- i. intensification — a technique used to increase the brightness of the image while maintaining its sharpness. Used particularly in fluoroscopy and viewing directly or indirectly through a television camera and monitor, cineradiography, videotape or split-film device.
- latent i. — the invisible picture on the film after it has been exposed to the x-ray beam. It requires exposure to a developer and fixer before the image is visible and permanent.
- weak i. — said of x-ray films which lack density due to underexposure, too brief period of development, insufficient developer or developer temperature too low.
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For other uses, see Image (disambiguation).
 Diagram of IMAGE spacecraft |
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| General information | |
|---|---|
| NSSDC ID | 2000-017A |
| Launch date | March 25, 2000[1] |
| Launched from | Vandenberg AFB, USA[1] |
| Launch vehicle | Delta II 7326[1] |
| Mass | 536 kg (1181.7 lb)[1] |
| Website | http://image.gsfc.jhu.edu/ |
| References: [1] | |
IMAGE (from Imager for Magnetopause-to-Aurora Global Exploration), or Explorer 78, was a NASA MIDEX mission that studied the global response of the Earth's magnetosphere to changes in the solar wind. It was launched March 25, 2000 by a Delta II rocket from Vandenberg AFB and ceased operations in December 2005.
The IMAGE craft was placed in a 1,000×46,000 km orbit around the Earth, with an inclination of 90° (passing over the poles) and a 14.2 hour period. IMAGE was the first spacecraft dedicated to observing the magnetosphere of the Earth, and it produced comprehensive global images[disambiguation needed 
] of plasma in the inner magnetosphere. It did this using five instruments:
- Neutral Atom Imagers (LENA, MENA, HENA)
- Far-Ultraviolet (FUV) Imaging System
- Extreme Ultraviolet (EUV) Imager
- Radio Plasma Imager (RPI)
- Central Instrument Data Processor (CIDP)
The CIDP as well as the Command & Data Handling Subsystem (main on-board computer) of the craft were built around the mission-proven RAD6000 avionics processors.
See also
External links
- IMAGE NASA page, with tabular presentation of key spacecraft details
- Southwest Research Institute
- NSSDC Master Catalog information on the IMAGE mission
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Wikimedia Commons has media related to: IMAGE |
References
- ^ a b c d e f "NSSDC Master Catalog Display: Spacecraft". NASA.gov. 2007-05-18. http://nssdc.gsfc.nasa.gov/nmc/masterCatalog.do?sc=2000-017A. Retrieved 2007-09-07.
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Saunders Veterinary Dictionary
Saunders Comprehensive Veterinary Dictionary 3rd Edition. Copyright © 2007 by D.C. Blood, V.P. Studdert and C.C. Gay, Elsevier. All rights reserved.
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