The Level-1B product is composed of an ensemble of granules that are 25 km across track (AC) by 23 km along track (AL). Each granule is approximately 27 MB in size

The Level-1B product provides radiometrically corrected imagery in Top-Of-Atmosphere (TOA) radiance values and in sensor geometry. Additionally, this product includes the refined geometric model which is used to generate the Level-1C product. Level-1B pixel coordinates refer to the centre of each pixel.

Radiometric corrections applied to the Level-1B are:

• dark signal
• pixels response non uniformity
• crosstalk correction
• defective pixels interpolation
• high spatial resolution bands restoration (deconvolution plus denoising). This correction is disabled by default in the Level-1B processing.
• binning (spatial filtering) for 60 m bands
• radiometric offset addition to avoid truncation of negative value

Level-1B product is not released to Users.