Accession Number : AD0804109

Title :   FEASIBILITY STUDY OF AN ION-PROPELLED MARS ORBITER/LANDER SPACECRAFT WITH SOLAR PHOTOVOLTAIC POWER. VOLUME I. SUMMARY.

Descriptive Note : Final technical rept., Mar-Sep 65,

Corporate Author : XEROX ELECTRO-OPTICAL SYSTEMS PASADENA CA

Personal Author(s) : Toms, R. S. H. ; Waddell, R. L. ; Fine, S. B.

Report Date : DEC 1966

Pagination or Media Count : 87

Abstract : Volume I describes a solar-electric propelled spacecraft using ion engines and photovoltaic power to effect the heliocentric transfer from Earth to Mars, carrying a lander and orbiter to perform a Voyager-type mission. The mission feasibility is described in terms of trajectory analysis, launch requirements and parametric trade-offs, resulting in substantial gains for electric propulsion compared with conventional chemical propulsion. Feasibility of the ion propulsion system is described with summaries of supporting programs on feed systems, neutralizers, power conditioning, and thrustor system life tests. Spacecraft feasibility is described in terms of subsystem integration, launch vehicle compatibility, deployment, and system operation. Volume II describes mission analysis and propulsion system design, together with its development to a fixed thrust line, boost-coast trajectory employing a near-rendezvous approach. Volume III describes the craft design and its interfaces with the launch vehicle and lander. Selection and analysis of subsystems includes the structure, power, attitude control, telecommunications, and scientific payload. System integration discussion includes mass distribution, thermal analysis, mechanisms, deployment, mission profile and system operation. The conceptual design and weight summary for a baseline craft are given, together with comparison with the basic Voyager design. (Author)

Descriptors :   *SOLAR CELLS), (*ION ENGINES, (*MARS PROBES, FEASIBILITY STUDIES), SOLAR PANELS, ORBITS, LAUNCH VEHICLES, RENDEZVOUS SPACECRAFT, CESIUM, ION BOMBARDMENT, SPACE PROBES, ELECTROOPTICS.

Subject Categories : Electric and Ion Propulsion
      Unmanned Spacecraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE