Most of the ESA archive has been acquired and processed at receiving stations
in Fucino (Italy), Kiruna (Sweden) and Maspalomas (Gran Canaria, Spain).
However, the archive contains also a substantial number of data acquired and
processed by receiving stations elsewhere (e.g. the US, Brasil, Canada, ect.).
The system corrected data ... contains MSS data radiometrically and geometrically
corrected relative to the four MSS spectral bands covering on full WRS scene.
Radiometric and geometric corrections are applied in sequence and the quality
standards are expressed by combined radiometric and geometric corrected data
Each pixel's radiometric value is processed through a look-up table, generated
with one of the following methods:
* Relative radiometric corrections method (statistical): this method performs
the statistical equalisation for the different detectors of the same band.
* Absolute in flight radiometric calibration: this method utilizes the
on-board calibration wedge data to determine the absolute radiometric
calibration gains and offsets.
* Relative and absolute radiometric calibration method: this process is a
combination of the above methods.
The MSS geometric corrections are based on the generation of three geometric
correction tables which group the different geometric error sources and model:
* the along scan correction table (panoramic distorsion, Earthcurvature,
satellite altitude and attitude, etc.)
* scan skew offset table
* between line distance table whichaccounts for the nadir velocity,variation of
the S/C pitch angle, S/C altitude.
Landsat full scene of imagery data correspond to an effective ground coverage
area of approximately 185 km wide by 185 km in along-track direction for
Landsat 1, 2, 3 and 185 x 170 for Landsat 4 and 5. A standard full scene is
nominally centred on the intersection between a path and row (the actual image
centre can vary by up to 20 km). For a floating full scene the placement along
the path is chosen by the customer. The centre point of the floating full scene
is defined by the path number and the required latitude. A full image is
composed of 6920 pixels x 5760 lines and each band requires 40 Mbytes of
To order data please see http://earth.esa.int/helpandmail/help_order.html