Computer Science – Performance
Scientific paper
Jan 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aipc..387..445m&link_type=abstract
Space technology and applications international forum (STAIF - 97). AIP Conference Proceedings, Volume 387, pp. 445-452 (1997).
Computer Science
Performance
Spaceborne And Space Research Instruments, Apparatus, And Components, Thermionic Conversion, Energy Storage Systems, Including Capacitor Banks, Other Topics In Electronics, Radiowave And Microwave Technology, And Direct Energy Conversion And Storage, Performance Characteristics Of Energy Conversion Systems, Figure Of Merit, Artificial Earth Satellites
Scientific paper
The Integrated Solar Upper Stage (ISUS) is a solar thermal system that provides both propulsion and electric power. Using hydrogen as the propellant, ISUS can provide average specific impulses between 750 and 800 seconds. Once in final orbit, the stage uses thermionic diodes to produce electricity for the satellite payload throughout its operating lifetime. Because of its high specific impulse, ISUS can increase the total mass delivered to GEO by any launch vehicle by up to 250%. ISUS can provide benefits to commercial system in lower orbits as well. These orbits are particularly demanding on battery system because of the short orbit periods and the resulting number of battery cycles. Thermal storage in the ISUS receiver can accommodate these cycles without increasing system mass. ISUS also provide more efficient propulsion for station keeping and for separation of satellites when multiple satellites are launched for a single launch vehicle.
Malloy John
Miles Barry
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