IRS C/D

IRS Pan data is acquired over the visible green to near infrared portion of the spectrum, and has 5.8 metre spatial resolution. However, compared to SPOT Pan data, which has 256 grey levels, IRS Pan has only 64 grey levels. Therefore, the increased spatial resolution of the IRS imagery has to be balanced against the better depth of SPOT data. Generally, IRS data is fine in lower latitudes.