Study on co-operational measurement system for plasma waves by means of formation-flying satellites

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In order to achieve an observation of the space plasma environment around the Earth using formation-flying satellites, we performed feasibility studies on the intelligent software receiver onboard these satellites. We developed a system using LAN-connected PCs in order to simulate inter-communication among satellites as well as onboard data processing functions, and evaluated several kinds of co-operational observation algorithms under realistic condition. Second, we studied advanced data processing methods such as spectrum analyses, data compression and selection to be implemented on the onboard software within a limited computer resource. We also proposed techniques for deriving electron density profile from the data measured by the plasma wave instruments.