Satellites

Satellites

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

Contributors in Satellites

Satellites

The quantitative measurement of the properties of an object at one or several wavelength intervals. Spectral signature analysis techniques use the variation in the spectral reflectance or emittance ...

detector responsivity

Aerospace; Satellites

The radiometric response of an electronic detector that converts photons into voltage or current. Detector responsivity includes the end-to-end optical and electrical path, since radiometric ...

cross-calibration

Aerospace; Satellites

The radiometrical comparison of one sensor to another sensor on different satellites. Imagers are often considered to be cross-calibrated if they are calibrated to a common source such as an ...

linear quantizing

Aerospace; Satellites

The range of grey shades from maximum to minimum is divided into contiguous intervals, each of equal length, and each grey shade is assigned to the quantized class which corresponds to the interval ...

transmittance

Aerospace; Satellites

The ratio of the energy per unit time per unit area (radiant power density) transmitted through an object to the energy per unit time per unit area incident on the object. In general, transmittance ...

signal-to-noise ratio (SNR)

Aerospace; Satellites

The ratio of the level of the information-bearing signal power to the level of the noise power. SNR determines the precision of a radiometric measurement. The signal-to-noise ratio (SNR) is defined ...

attenuation

Aerospace; Satellites

The reduction in the intensity of radiation, with distance from its source due to atmospheric absorption and/or scattering; it does not include the inverse-square decrease of intensity of radiation ...