Imaging Spectrometers/Radiometers
2018-07-04 09:07:07.0 [mmorahan] insert AltLabel (id: null category: primary text: High Resolution Advanced Imaging System language code: en); insert Definition (id: null text: HiRAIS is an optical payload, designed and developed by SI (Satrec Initiative) of Daejeon, Korea in collaboration with Elecnor Deimos. The proven design has a significant heritage with DubaiSat-1 and -2 of EIAST (Emirates Institution for Advanced Science and Technology), United Arab Emirates. Dubaisat-2 is an almost exact Deimos-2 twin. The HiRAIS instrument consists of three elements: • EOS (Electro-Optical Subsystem) • SSRU (Solid-State Recorder Unit) • ITU (Image Transmission Unit). EOS is comprised of the following elements: telescope, ACM (Auxiliary Camera Module), and FPA (Focal Plane Assembly). EOS is a pushbroom type camera with 1 m GSD (Ground Sampling Distance) for a panchromatic imagery and 4 m GSD in four MS (Multispectral) bands (red, green, blue and NIR). The swath width of the generated image is 12 km. EOS features a Korsch telescope with 5 mirrors. The optical design includes the main mirror (M1) of 415 mm diameter, 3 mirrors to increase the focal length up to 5.7 m, and a flat mirror to reflect light rays onto FPA. Light-weighted Zerodur is used for the mirrors, while CFRP material was used to design the main optomechanical structure of HiRAIS. The temperature balance of the mirror surfaces, the distances between the mirrors and the FPA are all actively controlled by a feedback heating system, which includes thermostats and heaters. Also passive cooling with heat dissipative materials. language code: en); insert WeightedRelation (id: null related concept uuid: 48e0f5f2-08fb-4739-8c5f-f53e24003f8c relationship type: null relationship value: null generated by: null);
HiRAIS is an optical payload, designed and developed by SI (Satrec Initiative) of Daejeon, Korea in collaboration with Elecnor Deimos. The proven design has a significant heritage with DubaiSat-1 and -2 of EIAST (Emirates Institution for Advanced Science and Technology), United Arab Emirates. Dubaisat-2 is an almost exact Deimos-2 twin. The HiRAIS instrument consists of three elements: • EOS (Electro-Optical Subsystem) • SSRU (Solid-State Recorder Unit) • ITU (Image Transmission Unit). EOS is comprised of the following elements: telescope, ACM (Auxiliary Camera Module), and FPA (Focal Plane Assembly). EOS is a pushbroom type camera with 1 m GSD (Ground Sampling Distance) for a panchromatic imagery and 4 m GSD in four MS (Multispectral) bands (red, green, blue and NIR). The swath width of the generated image is 12 km. EOS features a Korsch telescope with 5 mirrors. The optical design includes the main mirror (M1) of 415 mm diameter, 3 mirrors to increase the focal length up to 5.7 m, and a flat mirror to reflect light rays onto FPA. Light-weighted Zerodur is used for the mirrors, while CFRP material was used to design the main optomechanical structure of HiRAIS. The temperature balance of the mirror surfaces, the distances between the mirrors and the FPA are all actively controlled by a feedback heating system, which includes thermostats and heaters. Also passive cooling with heat dissipative materials.
HiRAIS