11:00 〜 11:15
[MGI35-08] KOSEN-1 satellite for Jupiter's radio science
キーワード：超小型衛星、木星電波、デカメートル波、ビーム構造
KOSEN-1, a 2U-CubeSat Jupiter Radio Observation Technology Demonstration Satellite, is developed by 10 colleges of the national institute of technology (Kochi College, Gunma College, Tokuyama College, Gifu College, Kagawa College, Yonago College, Niihama College, Akashi College, Kagoshima College, and Tomakomai College) led by Kochi College and Gunma College. KOSEN-1 was selected by JAXA as one of the themes for the Innovative Satellite Technology Demonstration-2, and was launched by JAXA's Epsilon-5 Launch Vehicle on November 9th, 2021.
The scientific purpose of KOSEN-1 is to measure the delay time of Jupiter radio emissions by using a correlation analysis method. The delay time can be measured by the correlation analysis of waveform data obtained by simultaneous observations of Jupiter's radio S-bursts between this satellite and the ground. If the beam of Jupiter's radio S-bursts is moving together with the rotation of Jupiter, we can calculate a time difference of about 70 milliseconds at the baseline length of 8000 km. Using the proposed simultaneous observations, it is possible to test whether the Jovian S-bursts are emitted like a 'beacon', rotating with Jupiter's magnetic field and sweeping by the Earth, or like a 'flashlight', an instantaneous emission with a 0 millisecond time delay. This information can give a better understanding of the nature of the Jupiter's radio emission mechanism.
KOSEN-1 satellite includes the development of many innovative elemental technologies required for the next generation of CubeSats. In addition, as a development method, KOSEN-1 took a new distributed development approach in which many organizations participate, fully using the Internet. The technology will be inherited by KOSEN-2, which has been selected as the satellite for JAXA's Innovative Satellite Technology Demonstration-3 Program. And also, we would like to open our technology so that it can be used by many organizations.
The KOSEN-1 project is supported by the Coordination Funds for Promoting AeroSpace Utilization of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), JAPAN.
The scientific purpose of KOSEN-1 is to measure the delay time of Jupiter radio emissions by using a correlation analysis method. The delay time can be measured by the correlation analysis of waveform data obtained by simultaneous observations of Jupiter's radio S-bursts between this satellite and the ground. If the beam of Jupiter's radio S-bursts is moving together with the rotation of Jupiter, we can calculate a time difference of about 70 milliseconds at the baseline length of 8000 km. Using the proposed simultaneous observations, it is possible to test whether the Jovian S-bursts are emitted like a 'beacon', rotating with Jupiter's magnetic field and sweeping by the Earth, or like a 'flashlight', an instantaneous emission with a 0 millisecond time delay. This information can give a better understanding of the nature of the Jupiter's radio emission mechanism.
KOSEN-1 satellite includes the development of many innovative elemental technologies required for the next generation of CubeSats. In addition, as a development method, KOSEN-1 took a new distributed development approach in which many organizations participate, fully using the Internet. The technology will be inherited by KOSEN-2, which has been selected as the satellite for JAXA's Innovative Satellite Technology Demonstration-3 Program. And also, we would like to open our technology so that it can be used by many organizations.
The KOSEN-1 project is supported by the Coordination Funds for Promoting AeroSpace Utilization of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), JAPAN.