This material helps to connect this new concept with information you already know.

This figure shows the relationship between IFOV and GIFOV. In satellite meteorology instrument resolution is often stated in terms of a GIFOV. For example, the GOES visible channel has a GIFOV of 1 km at nadir. The GOES IR channel has a GIFOV of 4 km at nadir.

Instantaneous Field Of View
Relationship between IFOV and GIFOV