Prelaunch Status of Hyperspectral Imager Suite (Hisui)

Abstract

Hyperspectral Imager Suite (HISUI) is a Japanese hyperspectral mission to obtain optical images ranging from visible to shortwave infrared region. The mission instrument will be on-board the Japanese Experiment Module (JEM) of the International Space Station (ISS) in early 2020. The sensor obtains spectral images of 185 bands with the ground sampling distance of 20x31 meter, which succeeds the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) in the visible and shortwave infrared region. After the critical design review in 2014, integration of the Flight Model (FM) of HISUI sensor was completed in the beginning of 2017. In parallel, the bus system connecting HISUI sensor and the JEM External Facility (EF) is developed, which has the function of a data recorder, electric control, navigation, thermal control and mechanical structure is under development. Since hyperspectral data needs an accurate calibration, the ground-based test is under way. In this work, the present status of HISUI sensor is presented. Sensor performances in terms of optical distortion and radiometric performances are described based on the FM tests.