Hyper Spectral Imager for lunar mineral mapping in visible and near infrared band

The Hyper Spectral Imager (HySI), operating in the visible and near infrared spectral region, is one of the three imaging instruments on board Chandrayaan-1 spacecraft for mineralological study of the Moon. HySI will map the entire lunar surface in 64 contiguous bands in the visible and near infrared (VNIR: 421― 964 nm) with a spatial sampling of 80 m. A wedge filter is employed for the spectral separation and the image is mapped on an area detector. The detector output is processed in the front-end electronics to generate the 64-bands with 12-bit quantization. HySI is a highly compact instrument weighing 2.5 kg with a power requirement of 2.6 W.