- Industry: Aerospace
- Number of terms: 16933
- Number of blossaries: 2
- Company Profile:
The Executive Branch agency of the United States government, responsible for the nation's civilian space program and aeronautics and aerospace research.
The mean Sun time at a given location on the Earth is determined by the distance in longitude from the Greenwich meridian. The mean Sun time at any location is determined by dividing the difference in longitude from Greenwich (in degrees, moving east) by 15 and adding the result to the current GMT. This will be the mean Sun time relative to Greenwich expressed in hours.
Industry:Aerospace
The measure, in units of power, of radiant flux incident on a surface; it has the dimensions of energy per unit time.
Industry:Aerospace
The number of numerical values used to represent a continuous quantity.
Industry:Aerospace
The point in the celestial sphere that is exactly overhead. Contrast with nadir.
Industry:Aerospace
The point in the orbit of a heavenly body, especially of a manmade satellite, at which it is farthest from the Earth.
Industry:Aerospace
The point in the orbit of heavenly body, especially of a man-made satellite, at which it is nearest the Earth.
Industry:Aerospace
The point toward which light rays converge to form an image after passing through a lens or having been reflected by mirrors. The condition of sharpest imagery.
Industry:Aerospace
The practice of using Landsat 7’s 15 m panchromatic band in conjunction with the other 30 m spectral bands to increase the apparent resolution of a multiband (color) Landsat 7 image to 15 m.
Industry:Aerospace
The preferred term for the middle wavelength ranges of the infrared region extending roughly from 3 µm at the end of the near infrared, to about 15 or 20 µm where the far infrared commences. In practice the limits represent the envelope of energy emitted by the Earth behaving as a greybody with a surface temperature around 290° K (27° C). Seen from any appreciable distance, the radiance envelope has several brighter bands corresponding to windows in the atmospheric absorption bands. The thermal band most used in remote sensing extends from 8 to 14 µm.
Industry:Aerospace
The preferred term for the shorter wavelengths in the infrared region (the entire infrared region extends from about 0.7 µm (visible red) to about 3 µm). The longer wavelength end grades into the middle infrared, sometimes called solar infrared, as it is only available for use during the daylight hours. Also known as the shortwave infrared (SWIR).
Industry:Aerospace
