PLATiNO-4: The Compact Hyperspectral Payload Program of the Italian Space Agency, Description and Status

The Italian Space Agency (ASI) under the "PLATiNO" multi-satellite constellation program have started the PLATiNO-3 and PLATiNO-4 payloads addressing Very High Resolution and Hyperspectral capabilities with small payloads under 100 kg, respectively. Proto-flight models of these instruments will be completed by 2024-2025. Under the same program, PLATiNO-1, a SAR mission in X-band and PLATiNO-2, a collaboration with NASA-JPL for the MAIA payload, will complete the constellation.In 2019 ASI launched the PRISMA instrument and from this baseline is developing a new "best-in-class" compact Hyperspectral payload (HYP-PL) that offers the same performance of its larger predecessor in a size and mass that can be adapted to multiple platforms in the small size range.In this article we present the main characteristics of the PLATiNO-4 payload.The HYP-PL is a <100Kg, single imaging spectrometer devoted to measure the spectral signature across the wavelength range 400-2500 nm by means of a diffraction grating as dispersing element. This spectral range matches many end-user requirements for environmental and commercial applications, such as water quality monitoring, oil spills, forest fire, soil protection, agriculture.The payload, after the successful development of breadboards and development models, is entering the D phase with the MAIT of the PFM.