Remote Sensing Glossary
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| Content: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z |
A
- Atmospheric correction
- A pre-processing step for satellite imagery to remove atmospheric effects in order to enhance accuracy of surface reflectance.
B
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C
D
E
F
G
H
I
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J
K
L
M
N
O
P
- Pixel
- The smallest spatial unit in a digital image. A satellite image is made up of a matrix of pixels, each having its own vector of digital values for each band.
R
- Radiometric resolution
- Sensitivity (maximum range of values or bandwidth) of the sensor in detecting different intensities of electromagnetic radiation in single spectral bands. Typically recorded in 6 bit, 7 bit, 8 bit, 10 bit or 16 bit per pixel. The contrast of a raster image is depending on radiometric resolution.
S
- Spatial resolution
- The size of a pixel (corresponding ground area that is covered by a pixel) that is recorded in a raster image – typically pixels correspond to square areas. The recorded spectral reflectance is integrated over a defined ground area (GIFOV = ground-projected instantaneous field of view).
- Spectral resolution
- Number and wavelength bandwidth of the single spectral bands recorded by a sensor.
T
- Temporal resolution
- Temporal frequency or revisiting time of the same location on the earth surface of the sensor.
U
V
W
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