Building Earth Observation Cameras

244 Building Earth Observation Cameras

The detector is a 12 K linear CCD with 7-μm pixel similar to that used in

LISS-4 as discussed in Chapter 6. A band-pass interference lter kept in front

of the CCD decides the spectral region covered. Two CCDs are placed in the

along-track direction, each having its own electronics for redundancy. The

electronics are similar to that of LISS cameras (Chapter6), but tuned to the

Carto2 data requirements. The data is digitized to 10 bits and compressed to

3.2 bits per pixel for transmission. The Cartosat-2 series satellites are agile to

point the optical axis along and across track up to ±26° to provide mu ...