Three experimental small satellites were developed and flown by ISRO for imaging purposes. This paper gives the details of the payloads of these satellites. The first satellite was ROHINI-D1 which carried a single-band panchromatic band camera. The ROHINI-D2 satellite had a two-band camera using linear detector arrays and had a capability to identify features using the ratio of signals in two spectral bands. The SROSS-2 satellite carried a stereo imaging camera with capabilities of getting triple images along the ground track.
T. K. Alex, T. K. Alex,
"Imaging capabilities of small satellites: Indian experience", Proc. SPIE 1495, Small-Satellite Technology and Applications, (1 July 1991); doi: 10.1117/12.45873; https://doi.org/10.1117/12.45873