The one instrument on Chandrayaan-3's propulsion module. It looks back at Earth as if it were a distant planet, to learn how to recognise habitable exoplanets.
From far away, an Earth-like planet around another star would be a single dot of light. SHAPE records Earth's light in the same way, as one point, measuring its near-infrared spectrum and polarisation. The spectrum hints at what the atmosphere and surface are made of, and polarisation helps describe clouds.
It uses an acousto-optic tunable filter, a crystal whose colour selection is tuned by a radio signal, and two indium gallium arsenide detectors. The Space Astronomy Group of ISRO's U R Rao Satellite Centre designed it.
SHAPE was planned to work for three months from lunar orbit. Because fuel was left over, ISRO moved the propulsion module from lunar orbit back into an Earth orbit in late 2023, partly so SHAPE could keep observing Earth.