出典:Wiktionary
出典:Wikipedia
出典:『Wikipedia』 (2010/07/05 13:24 UTC 版)
High Performance Green Propulsion (HPGP) is a rocket propellant developed by the Swedish aerospace company ECAPS as a safer alternative to hydrazine. HPGP is based on ammonium dinitramide mixed with ammonia and methanol. Its specific impulse is around 235 seconds. The Prisma mission serves as a demonstrator mission for HPGP.