Four plasma instruments are currently under development for KAISTSAT-4 (K-4) which is scheduled for launch in 2002. They are the Solid-State Telescope, Electro-Static Analyzer, Langmuir Probe, and the Scientific Magnetometer, that will respectively allow in-situ detection of high energy and low energy components of auroral particles, ionospheric thermal electrons, and magnetic field disturbances. These instruments, together with the Far-ultraviolet IMaging Spectrograph, will provide micro-scale physics of Earth's polar ionosphere with detailed spectral information that has not been previously achieved with other space missions. In this paper, we review the concept of the four space plasma instruments as well as the anticipated results from the instruments.

• 황정아(한국과학기술원) | HWANG JUNG-A (Department of Physics, Korea Advanced Institute of Science and Technology)
• 이재진(한국과학기술원) | LEE JAE-JIN (Department of Physics, Korea Advanced Institute of Science and Technology)
• 이대희(한국과학기술원) | LEE DAE-HEE (Department of Physics, Korea Advanced Institute of Science and Technology)
• 이진근(한국과학기술원) | LEE JIN-GUN (Department of Physics, Korea Advanced Institute of Science and Technology)
• 김희준(한국과학기술원) | KIM HEE-JUN (Department of Physics, Korea Advanced Institute of Science and Technology)
• 박재홍(한국과학기술원) | PARK JAE-HEUNG (Department of Physics, Korea Advanced Institute of Science and Technology)
• 민경욱(한국과학기술원, 인공위성연구센터) | MIN KYOUNG WOOK (Department of Physics, Korea Advanced Institute of Science and Technology, Satellite Technology Research Center, Korea Advanced Institute of Science and Technology)
• 신영훈(Star V-ray(연구소)) | SHIN YOUNG-HOON (Star V-ray)