High-Resolution Visible and InfraRed (HRVIR)
With respect to the HRV instrument on board SPOT 1, 2 and 3 the HRVIR had the same geometric imaging characteristics but improved performance was achieved by adding a new shortwave infrared spectral band (SWIR).
Two identical HRVIR imaging instruments on SPOT 4 were able to operate in two modes either simultaniously or individually.
The HRVIR had an oblique viewing capability of 27° on each side of the local vertical.The swath was 117 km2 if both sensors were used simultaniously with a 3km2 overlap
HRVIR Instrument Details
||High-resolution optical pushbroom imager
|Ground Sample Distance
||Panchromatic: 10 m
Multispectral: 20 m
NIR (Near Infrared)
1.53 - 1.75µm
|Instrument Field of View
|Ground Sampling Interval (Nadir Viewing)
||Panchromatic:10 m x 10 m
Multispectral:20 m x 20 m
|Pixel per Line
The VEGETATION instrument was carried on SPOT 4 and onward. It acts independently of the HRVIR (Visible & Infrared High-Resolution) sensors. This instrument can cover almost all Earth’s surface in a day because of its swath size of 2250 km. It captures reflected light in four spectral bands (blue, red, near-infrared, and middle-infrared).