Optical multi-spectral instruments used to image the atmosphere and Earth's land and sea surface, providing accurate spectral information at spatial resolutions of the order of 100m up to several kilometres, with a swath width generally in the range of several hundred to a few thousand km.
Atmospheric constituents, land cover and temperature, and ocean colour and temperature can variously be acquired. Multi-spectral data returns additional environmental information.
When operating at Visible/IR wavelengths, multi-spectral radiometers cannot penetrate cloud or rain and hence are predominantly limited to clear weather observations. Operating at microwave wavelengths, these instruments have the advantage of cloud penetration and hence all weather capability.
SPOT HRV(IR) (SPOT.HRV.HRV.IR)
ESA can distribute data, within the terms of a category-1 agreement, for the following SPOT missions:
The HRV (High Resolution Visible) sensor operates 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 can point in the cross-track direction up to 31 degrees from nadir. The swath width varies from 60 km (nadir) to 80 km when angled at the maximum limit from nadir. HRV panchromatic has spectral range between 500 nm and 730 nm (one channel) and 10 m spatial resolution.
The Spatial Resolution is 20 meters and 10 metres.
All products will be delivered in DIMAP format. DIMAP typically contains 2 files IMAGERY.TIF: image file in GeoTIFF format METADATA.DIM: XML metadata file
Image data is by default in GeoTIFF format, based on the Tagged Image File Format (TIFF) that is the most widely used today. The Geo part of GeoTIFF basically adds georeferencing information from the image file to the TIFF file (geographic coordinates of the top-left corner and pixel sizes) and may also specify the map projection and geodetic system.
Metadata are in XML format (eXtensible Markup Language). XML is like HTML, only its structure is better defined and it allows users to create their own keywords and associated values.
Default delivery via FTP.
Data Set Specifications
1986-02-01 to to today (and new acquisitions)
90 N, 90 S, 180 W, 180 E
Optical/Multi Spectral Radiometry Low/Medium Resolution
Level 1 , Level 1b , Level 2