Innovations in mission architectures for exploration beyond low earth orbit

Cooke, D. R.; Joosten, B. Kent; Lo, Martin W.; Ford, Kenneth M.; Hansen, R.J.

doi:10.1016/s0094-5765(03)80006-1

Cited by 4 publications

(1 citation statement)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Particularly advantageous is one at either the Earth-Moon L1 or L2 points, which are 84% of the way from the Earth to the Moon, or 16% beyond it, respectively. The usefulness of these locations in the context of space exploration from a lunar-capable program was identified by the NASA Exploration Team (NExT) 14 that studied operations with a large infrared telescope (the Dual Anamorphic Reflector Telescope -DART) which can be considered a variant of SAFIR. The return time to a lunar refuge from these locations can be as short as one day.…”

Section: Human/robotic Servicing Venuesmentioning

confidence: 99%

Large infrared telescopes in the exploration era: SAFIR

Lester¹,

Budinoff

Lillie

2007

SPIE Proceedings

View full text Add to dashboard Cite

The Single Aperture Far Infrared (SAFIR) observatory -a concept design for a 10m-class spaceborne far-infrared and submillimeter telescope, has been proposed for development, and given high priority by agency strategic planners. SAFIR will target star formation in the early universe, the chemistry of our interstellar medium, and the chemical processes that lead to planet formation. SAFIR is a telescope that, with passive cooling at Earth-Sun L2, achieves temperatures that allow background-limited broad-band operation in the far infrared. This observatory is baselined as being autonomous in deployment and operation, but consideration has been given to understanding the enabling opportunities presented by Exploration architecture. As this architecture has become better defined, these opportunities have become easier to understand. We present conceptual strategies that would use modestly enhanced Exploration architecture to service and maintain SAFIR, allowing extended duration, lower risk and hardware cost, and performance enhancements linked to the steep development curve for sensor technology. These efforts, which would rely on both human and robotic agents, presume routine operations at Earth-Sun L2, and servicing at an Earth-Moon L1 jobsite. The latter is understood to be easily accessible to a lunar-capable Exploration program. This study bridges the interface between Exploration technology and astronomical space observatory technology. Such an Exploration-enhanced version of SAFIR can be seen as a strawman for more ambitious far future work, in which much larger science instruments that cannot be packaged in a single launch vehicle are not only serviced and maintained in space, but also constructed there.

show abstract

Section: Human/robotic Servicing Venuesmentioning

confidence: 99%

Large infrared telescopes in the exploration era: SAFIR

Lester¹,

Budinoff

Lillie

2007

SPIE Proceedings

View full text Add to dashboard Cite

show abstract

Reliability evaluation of spacecraft power generation performance with competitive failure processes under irradiation

Zhang,

Zeng,

Huang

et al. 2024

Quality & Reliability Eng

View full text Add to dashboard Cite

The performance of space power systems is crucial for space products as it determines the operational capabilities, endurance, and efficiency of satellites, spacecraft, and other extraterrestrial devices. Unlike reliability analysis in aerospace systems, studying spacecraft power generation performance requires consideration of both hardware and software aspects. Existing failure models do not fully capture the self‐recovery process of control programs. Therefore, this study presents an impact degradation model for space power systems that incorporates competitive failures under irradiation conditions. The model analyzes solar arrays and power controllers to derive a performance degradation model by considering the defect formation mechanism of amorphous semiconductor materials. Additionally, two shock types are defined based on redundancy backup in power controllers and scrubbing frequency in field‐programmable gate array (FPGA) units. Within the case analysis section, the research meticulously investigates and elucidates the correlation probabilities among varying proton irradiation doses, scrubbing frequencies, and the aforementioned shock types.

show abstract