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- W2282047007 abstract "This thesis carries out both technical and policy analyses on a progression of topics. These topics are cost modeling of distributed satellite systems, determination of propulsion system requirements for satellite clusters and swarms, and an analysis of ion micropropulsion systems for use in swarms of microsatellites. The total cost over a 10 year mission life is calculated for configurations of the NPOESS mission in which the primary instruments were distributed among three smaller satellites. This increased reliability of the distributed configuration substantially reduces the number of ground and on-orbit spares required. As a result, mission costs are reduced compared to a single large satellite configuration. The relative positions of satellites in a cluster are altered by “tidal” accelerations which are a function of the cluster baseline and orbit altitude. Near continuous thrusting by a propulsive system was found necessary to maintain the relative positions of the satellites within allowable tolerances. Satellite mass, volume, and power constraints limit reasonable cluster baselines to approximately 30 m, 300 m, and 5000 m at 1000 km, 10,000 km, and GEO altitudes respectively. To maintain these cluster baselines, the propulsive system must operate at specific impulses and efficiencies consistent with those of ion engines. The performance of the linear ion microthruster concept is examined using Brophy’s model to predict energy costs per beam ion. Efficiency of the linear ion microthruster was calculated to be in the range of 15%. At this efficiency, the linear ion microthruster is not able to perform station keeping requirements for cluster missions." @default.
- W2282047007 created "2016-06-24" @default.
- W2282047007 creator A5025620489 @default.
- W2282047007 date "1998-01-01" @default.
- W2282047007 modified "2023-09-26" @default.
- W2282047007 title "Ion micro-propulsion and cost modeling for satellite clusters" @default.
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- W2282047007 hasPublicationYear "1998" @default.
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