Satellites

Satellites

Of or relating to any man-made object launched to orbit Earth or another celestial body.

Industry: Aerospace

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Satellites

Greenwich mean time

Aerospace; Satellites

Mean solar time of the meridian of Greenwich, England (known as the prime meridian, longitude 0°), used by most navigators and adopted as the prime basis of standard time throughout the world. ...

radiance

Aerospace; Satellites

Measure of the energy radiated by an object. In general, radiance is a function of viewing angle and spectral wavelength and is expressed as energy per solid angle.

spectral striping

Aerospace; Satellites

Non-uniform detector-to-detector variations that are due to different spectral responses of the adjacent detectors. Spectral striping is rarely considered a problem within a single band of an ...

normalized difference vegetation Index (NDVI)

Aerospace; Satellites

NDVI is the most commonly used vegetation index for satellite imagery. The difference in reflectance from the near infrared and red bands is divided by the sum of the two reflectances. This ...

ground truth/ground observations

Observations made on the ground at a site that is being imaged from space for the purpose of verifying either the absolute radiometric and/or geometric calibration of the imagery or the classified ...

scan line corrector-off (SLC-off)

Aerospace; Satellites

On May 31, 2003, the Scan Line Corrector (SLC), which compensates for the forward motion of Landsat 7, failed. Subsequent efforts to recover the SLC were not successful, and the failure appears to be ...

primary color

Aerospace; Satellites

One of the three colors, either additive (blue, green, and red) or subtractive (cyan, yellow, and magenta) that may be combined to produce the full range of colors.