Atmospheric Phenomenon (cyclone, storm, hurricane)
The SPOT-1 to 4 satellites were the 1st generation of SPOT satellites. While SPOT-1 to 3 provided optical acquisitions from the same HRV (High Resolution Visible) sensor, SPOT-4 provided optical acquisitions from an improved HRVIR (High Resolution Visible InfraRed) sensor.
The HRV (High Resolution Visible) sensor operated in two modes, namely the Multispectral Mode and the Panchromatic Mode. Two identical HRV instruments with 3 VNIR bands and a ground resolution of 20 m could point in the cross-track direction up to 31 degrees from nadir. The swath width varied from 60 km (nadir) to 80 km when angled at the maximum limit from nadir. HRV panchromatic had spectral range between 500 nm and 730 nm (one channel) and 10 m spatial resolution.
HRVIR (High-Resolution Visible and Infrared) was an improved version of HRV with same pointing geometries and resolution capabilities as HRV. The instrument had three viewing modes: multispectral mode corresponding to HRV bands plus the SWIR with a ground resolution of 20 m, the monospectral mode corresponding to HRV with a ground resolution of 10 m and the combined mode which combined the multispectral and panchromatic modes.
- Level 1A: Radiometric correction of distortions due to differences in sensitivity of the elementary detectors of the viewing instrument. Intended for users who wish to do their own geometric image processing.
- Level 1B: Radiometric correction identical to that of level 1A. Geometric correction of systematic effects (panoramic effect, Earth curvature and rotation). Internal distortions of the image are corrected for measuring distances, angles and surface areas. Specially designed product for photo-interpreting and thematic studies.
- Level 2A: Radiometric correction identical to that of level 1A. Geometrical correction done in a standard cartographic projection (UTM WGS84 by default) not tied to ground control points. Allowing for possible differences in location, this product is used to combine the image with geographical information of various types (vectors, raster maps and other satellite images).
Resolution: 20 to 10 metres
90 N, 90 S, 180 W, 180 E
|Temporal coverage:||1986 - 2013|