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Wednesday, May 8, 2013

Resolution and Spectral Bands

SPOT products differ by pixel size (ground sample distance of 2.5 m, 5 m, 10 m or 20 m) and spectral acquisition mode (black and white or colour).
They correspond to:
  • a view of part of the Earth taken in one or more spectral bands with a given spatial resolution;
  • or the merging of two separate images acquired at the same time, one being in black and white and the other, colour.

SPOT products spectral modes

SPOT products SPOT satellites Spectral mode bands Nb pixel size
2.5 m colour 5 VHR+HX 3 2.5 m
2.5 m B&W 5 VHR 1 2.5 m
5 m colour 5 HM+HX 3 5 m
5 m B&W 5 HM 1 5 m
10 m colour 5 Hi 4 10 m
4 M+Xi 4 10 m
10 m B&W 4 M 1 10 m
20 m colour 4 Xi 4 20 m

SPOT satellites spectral bands and resolutions

sensor electromagnetic spectrum pixel size spectral bands
SPOT 5 Panchromatic
B1 : green
B2 : red
B3 : near infrared
B4 : mid infrared (MIR)
2.5 m or 5 m
10 m
10 m
10 m
20 m
0.48 - 0.71 µm
0.50 - 0.59 µm
0.61 - 0.68 µm
0.78 - 0.89 µm
1.58 - 1.75 µm
SPOT 4 Monospectral
B1 : green
B2 : red
B3 : near infrared
B4 : mid infrared (MIR)
10 m
20 m
20 m
20 m
20 m
0.61 - 0.68 µm
0.50 - 0.59 µm
0.61 - 0.68 µm
0.78 - 0.89 µm
1.58 - 1.75 µm

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