Start Date
4-1984 8:00 AM
Description
This paper presents the results of an analysis of alternative transportation scenarios for geosynchronous missions, leading to the Identification and evaluation of an evolutionary geosynchronous earth orbit (GEO) transportation system.
The concept 1s evolutionary 1n that 1t can be Initiated from an early capability space station by using expendable transfer stages (e.g., RAM) and grows Into a fully reusable orbit transfer vehicle to accommodate future mission requirements and growing space station capabilities.
The analysis demonstrates several advantages for this concept Including:
1. A transportation cost savings of at least $3.3 billion over a 10-year period.
2. An evolutionary capability that can accommodate actual needs as they develop.
3. Increased STS utilization due to relaxed launch window constraints and reduced ground processing time.
The Identified concept 1s based on a performance and cost assessment of alternative transportation scenarios used to accommodate a nominal 10-year GEO missions traffic model. The elements that make up each scenario Include candidate transfer vehicles (reusable, expendable, total transfer, perigee kick only), candidate basing (orblter, space station), candidate modes of transport to LEO (Integral, Independent), and candidate number of payloads for each transfer vehicle bound for GEO (single, multiple).
*Th1s work was performed for NASA Johnson Space Center under contract number NAS9-16715.
An Evolutionary GEO Transportation System
This paper presents the results of an analysis of alternative transportation scenarios for geosynchronous missions, leading to the Identification and evaluation of an evolutionary geosynchronous earth orbit (GEO) transportation system.
The concept 1s evolutionary 1n that 1t can be Initiated from an early capability space station by using expendable transfer stages (e.g., RAM) and grows Into a fully reusable orbit transfer vehicle to accommodate future mission requirements and growing space station capabilities.
The analysis demonstrates several advantages for this concept Including:
1. A transportation cost savings of at least $3.3 billion over a 10-year period.
2. An evolutionary capability that can accommodate actual needs as they develop.
3. Increased STS utilization due to relaxed launch window constraints and reduced ground processing time.
The Identified concept 1s based on a performance and cost assessment of alternative transportation scenarios used to accommodate a nominal 10-year GEO missions traffic model. The elements that make up each scenario Include candidate transfer vehicles (reusable, expendable, total transfer, perigee kick only), candidate basing (orblter, space station), candidate modes of transport to LEO (Integral, Independent), and candidate number of payloads for each transfer vehicle bound for GEO (single, multiple).
*Th1s work was performed for NASA Johnson Space Center under contract number NAS9-16715.
Comments
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