- 업종: 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 attribute of a color that differentiates it from grey of the same brilliance and that allows it to be classed as blue, green, red, or intermediate shades of these colors. See brightness and saturation.
Industry:Aerospace
The attribute of visual perception in accordance with which an area appears to emit more or less light. One of three psychological dimensions of color perception by which visual stimuli are ordered continuously and which is correlated with light intensity. See hue and saturation.
Industry:Aerospace
The boundary in spectral space beyond which a data point, or pixel, has such a low probability of inclusion in a given class that it is excluded from that class.
Industry:Aerospace
The center of the cluster of scene centers of scenes imaged over the same area but at different times. Useful as an indexing tool in view of the fact that slight changes in the Landsat orbit, in addition to difficulties in timing or framing individual Landsat scenes, cause scenes acquired on different dates over the same area to coincide inexactly.
Industry:Aerospace
The complete or perfect shadow of an opaque body, as a planet, where the light from the source of illumination is completely cut off.
Industry:Aerospace
The correction made to remotely sensed radiance (external link) to reduce or normalize for the intervening atmosphere (external link) between the Earth's surface and the satellite. The product of an atmospheric correction is the conversion of at-satellite spectral radiance to the innate reflectance or bidirectional reflectance of the surface. Also see radiometric reflective band calibration and reflectance.
Industry:Aerospace
The degree of asymmetry or deviation from symmetry of a distribution. Distribution skewed to the right has a positive skew. Distribution skewed to the left has a negative skew.
Industry:Aerospace
The difference between highlights and shadows; the ratio of reflecting power between the highlights and shadows is the contrast of the image. It is possible to change the contrast of Landsat images, when in digital form, by performing a linear stretch of the image grey levels as much as possible to fill the complete dynamic range of the display medium.
Industry:Aerospace
the range between the maximum and minimum amount of input radiant energy that an instrument can measure.
Industry:Aerospace
The effect (for example, a pulse of electromagnetic energy) conveyed over a communications path or system. Aboard Landsat, signals from the scene being sensed are received by the sensors and converted to another form prior to transmission to the ground.
Industry:Aerospace
