Retour SWH-2A-Carto Service

  Now available on the SWH-2A-Carto portal: Double the resolution of your SPOT 5 THR panchromatic images, thanks to the Supermode processing.

SWH data are available at Level 1A from REGARDS catalogue. In order to be in line with L1C Sentinel 2 products, the SWH-2A-Carto service enhance in a fast way ( from 1 to 5 seconds) the SWH-1A into equivalent L1C products (without refining), called SWH-2A-Carto.

The service uses SWH-1A product provides standart terrain corrected product (SWH-2A-Carto products) where the altitude and spatial resolution are set up by the processing in a cartographic projection. A metadata file is added to the product.

Output product: SWH Level 2A-Carto

Radiometry:

  • 8 bit coded – instrument digital counts (no calibration)

Geometry:

  • Data is projected at fixed ground altitude in UTM projection
  • Altitude is automatically estimated. It corresponds to a mean altitude read from DTM over the Region of Interest
  • Product orientated with respect to the geographic North
  • Pixel resolution is fixed, defined by the sensor and the satellite

As no GCPs are used in the processing location, performance corresponds to the initial one of the products:

  • About 500 m (RMS) for SPOT 1/2/3
  • About 200 m (RMS) for SPOT 4
  • About 50 m (RMS) for SPOT 5

Metadata file in xml format contains:

  • Data georeferenced Product characteristics (satellite, sensor, acquisition date product level...),
  • Image Georeferencing in cartographic projection frame,
  • Corners coordinates in cartographic projection and geographic frames (WGS84),
  • Solar (SZA) and View (VZA) zenith and azimuth angles,
  • Gains and offsets for reflectance conversion.