First flight of GSLV Mk III was known as lvm 3 which was loaded with liquid nitrogen in cryogenic tank.
Next version of GSLV Mk III will have semi cryogenic engine sce 200 replacing Vikas engine.
GISAT is geostationary satellite i.e, above 35000 km from earth surface that's why low resolution imagery. But the advantage of geostationary imagery satellite is that they are available at any given time.