Three optical RS system types (same framing as the sensors deck):

• Multispectral — a few broad discrete bands (Landsat, SPOT, IKONOS).
• Thermal — one or more bands in 3–14 µm (Landsat TIRS, ASTER TIR).
• Hyperspectral — hundreds of narrow contiguous bands (Hyperion on EO-1, 220 bands).

Reference: Jensen, 2000.