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Gustan, E. A.

Publications and source records attributed to Gustan, E. A..

8 records
All sourcesNASA NTRSDOE OSTI
NASA NTRS1985

CELSS Transportation Analysis

Regenerative life support systems based on the use of biological material was considered for inclusion in manned spacecraft. Biological life support systems are developed in the controlled ecological life support system (CELSS) program. Because of the progress achieved in the CELSS program, it is determined which space missions may profit from use of the developing technology. Potential transportation cost savings by using CELSS technology for selected future manned space missions was evaluated. Six representative missions were selected which ranged from a low Earth orbit mission to those associated with asteroids and a Mars sortie. The crew sizes considered varied from four persons to five thousand. Other study parameters included mission duration and life support closure percentages, with the latter ranging from complete resupply of consumable life support materials to 97% closure of the life support system. The analytical study approach and the missions and systems considered, together with the benefits derived from CELSS when applicable are described.

Olson, R. L.↗
NASA NTRS1984

CELSS transportation analysis

The results of a study conducted in order to estimate where potential transportation cost savings can be anticipated by using CELSS technology for selected future manned space missions, are presented. Six manned missions ranging from a low earth orbit mission to those associated with asteroids and a Mars sortie are selected from NASA planning forecasts for study during an analysis of the transportation system. Several environmental control and life-support systems which are used in developing life-support closure scenarios are investigated for estimates of weight, volume, and power requirements. It is shown that when the scenarios are combined with the transportation analysis, mission life-support cost estimates are provided.

Olson, R. L.↗
NASA NTRS1983

A near-term mission for CELSS

A study has been conducted on the mission types that may benefit from Controlled Ecological Life Support System (CELSS) technology, with emphasis on manned missions projected by NASA for the next 50 years and cost evaluations in which transportation system characteristics are factored. The CELSS analyses considered water, air revitalization, waste management, and food production. The six mission locations considered included four in the earth-moon system, together with asteroid belt and Mars surface missions. In the various locations, the radiation, solar flux and available materials scenario can be very different. It is concluded on the basis of these considerations that the short duration Mars sortie mission analyzed will not benefit from CELLS technology, while large manned bases beyond the earth-moon system will not only benefit, but positively require it.

Gustan, E. A.↗
NASA NTRS1972

Effects of aeolian erosion on microbial release from solids.

This study was initiated to determine the percentage of spores that would be expected to be released from the interior of solid materials by aeolian erosion on a planetary surface. Methyl methacrylate and Eccobond disks were fabricated so that each disk contained approximately 40,000 Bacillus subtilis var. niger spores. The disks were placed in a specially designed sandblasting device and eroded. Exposure periods of 0.5, 2 and 24 hours were investigated using filtered air to accelerate the sand. A series of tests was also conducted for a 0.5 hour period using carbon dioxide. Examination of the erosion products showed that less than 1% of the spores originally contained in the solids was released by aeolian erosion.

Gustan, E. A.↗