한국항공우주연구원

Standard platform for CAS500 Satellite

KARI has developed the CAS500-1 satellite to meet the satellite imaging requirement in the public sector effectively, expand the domestic satellite industrial base and industry cultivation, and promote satellite export. The CAS500 development program aims to reduce the satellite development period and cost by using the standard common platform that can easily accommodate various payloads such as optical cameras, synthetic aperture radar, microwave sounder, and hyper-spectrometer. Also, it plans to develop CAS500 series satellites in a short period of time and operate them simultaneously to satisfy the demands of various earth observations in the domestic public sector and reduce the observation interval. In the CAS500 1st stage program, the standard platform for 500 kg class CAS500 satellites is developed, and two (CAS500-1&2) satellites with 50 cm resolution electro-optical cameras are developed by using the standard platform. KARI has developed the CAS500-1 satellite and transferred the accumulated satellite development technologies of S/C system, Bus and payload to the Korean aerospace industries. So, Korean aerospace industries can lead the development of CAS500-2 satellite, it will expand the domestic satellite industry base and foster the industry.

Development of 50cm-class Electro-optical Camera

KARI has developed the KARI own model of the 50 cm-class electro-optical payload for CAS500-1 satellite, which is in high demand worldwide. It has secured high-precision mechanical technology and advanced electrical technology through the technical independence of the optical payload. It achieved a koreanization rate of 98.6 % by localizing optical payload components and technologies that have been dependent on overseas technology until now. The CAS500 satellites can be developed in relatively short period of time and low cost compared large-sized satellites, which is advantageous for industrialization. Moreover, the CAS500 satellite can be competitive in the global market since it can be developed at a lower cost than the 500 kg class satellites developed by advanced institutions worldwide. The missions of CAS500-1 satellite are providing high resolution ground images to meet public sector demands for land/resource observation and disaster monitoring and providing stereo images for national geometric information services. The shape and specifications of the CAS500-2 satellite are the same as those of the CAS500-1 satellite.

The 2^nd Stage of CAS500 Program taking into account a wide range of satellite requirements

The 2^ndstage CAS500 program consisting of CAS500-3, 4 and 5 satellites has been started and is being developed by Korean industry. KARI plays the role of technical audit and supervision of the 2^ndstage CAS500 program. The CAS500-3 satellite will be mainly used by the Ministry of Science and ICT for space technology verification and space science research. It will be launched by the Korean launch vehicle Nuri. Mainly used by the Rural Development Administration and the Korea Forest Service, the CAS500-4 satellite will be equipped with a wide-area electro-optical camera (swath width of 120 km and resolution of 5 m) for observing crops, agricultural water resources, and forest resources. The CAS500-5 satellite will be mainly used by the Ministry of Environment for water resource survey, river management, marine environment monitoring, and disaster/emergency monitoring. It will be equipped with C-band synthetic aperture radar with resolution of 10 m and swath width of 120 km.