The satellite data is recorded on high density tapes (HDDT). Data|
on HDDT is raw as recorded from satellite. The HDDT archive is kept 'forever'.
The data received is corrected to eliminate errors originating in the
satellite platforms, instrument imperfections and radiometric effects in the
atmosphere. Imagery data output is on CCTs or films.
The archive consists of around 15000 HDDTs with Landsat MSS, TM
and MOS data. Nearly 300000 MSS and TM QLs (Quick-Looks) are archived in