"The Indian Space Research Organisation (ISRO) says it plans to launch a full-fledged niche Earth observation (EO) satellite — called the Hyperspectral Imaging Satellite or HySIS — using a critical chip it has developed."
The gallium arsenide technology would come in handy here, because GaAs is much more radiation-resistant than silicon.
However, before any overexcitement kicks in: This particular chip is very likely without POET's involvement.