Measurement and Warning of Geo-magnetospheric Radiation Environment -- Overview & Plan
Abstract
Studies of the flux variability short- and long-term of radiation belt particles in the inner magnetosphere are particularly important not only for improving our understanding of the relevant phenomena associated with them but also for engineering considerations viz a viz spacecraft anomalies due to space environment effects Electro-Static Discharge ESD Single-Event Upset SEU Total Dose and Non-Ionizing Energetic Radiation Effects Therefore ongoing radiation measurement and monitoring by satellites is a requirement The current status of measuring radiation using JAXA satellites is reviewed Starting with Engineering Test Satellite-V ETS-V KIKU-5 in Japanese in 1987 efforts to conduct radiation measurements in space have continued using almost all former NASDA now JAXA satellites ETS-VI ADEOS ADEOS-II MDS-1 DRTS ongoing and ALOS ongoing in geostationary orbit GEO geostationary-transfer orbit GTO and low-Earth orbit LEO Electrons protons alpha particles and heavy ions have been the main objects of study We have experienced the effects of solar activity in two recent spacecraft anomalies 1 The Advanced Earth Observing Satellite II ADEOS-II Midori-II in Japanese a low-altitude polar Sun-synchronous satellite with an altitude of 800 km suffered a catastrophic power failure in October 2003 Solar cell power output dropped from 6 kW to 1 kW in 3 minutes from 1613 to 1616 UT on October 24 Just before the anomaly the magnetopause was compressed to below geosynchronous orbit according to
- Publication:
-
36th COSPAR Scientific Assembly
- Pub Date:
- 2006
- Bibcode:
- 2006cosp...36.1548G