Satellites

level

LANDSAT-5

> Product Level 0 ：raw data ,there are no any fundamental corrections that are applied to the data .

> Product Level 1 ：radiometric corrected data.

> Product Level 2 ：radiometric and systemically corrected data.

> Product Level 3：radiometric and geographical corrected data with GCP.

> Product Level 4：radiometric and geographical corrected data with GCP and DEM.

LANDSAT-7

> Product Level L0R：raw data ,there are no any fundamental corrections that are applied to the data .

> Product Level L1G：radiometric and systemically corrected data.

> Product Level L1P：radiometric and geographical corrected data with GCP.

> Product Level L1T：radiometric and geographical corrected data with GCP and DEM.

SPOT-1/2/4/5

> Product Level 1A：
*detector radiometric equalization (MTF enhancement and optional digital dynamic streching);
*no geometric correction.

> Product Level 1B：
*detector radiometric equalization (MTF enhancement and optional digital dynamic streching);
*bulk geometric processing (geometric corrections using an "a priori" knowledge of the system distorsions).

> Product Level 2A：
*detector radiometric equalization (MTF enhancement and optional digital dynamic streching);
*mapping into a given cartographic projection ( using an "a priori" knowledge of the system distorsions, without any Ground Control Point).

RADARSAT

>Raw

>Georeferenced Data:SLC, SGF, SGX, SGC, SCN , SCW

>Geocoded Data: SSG, SPG

ENVISAT

>Image mode

>Wide Swath mode

>Alternating Polarisation mode