|
报告内容
摘 要
|
A Next
Generation Gravity Mission (NGGM) will be ultimately devoted to improve our
understanding of the Earth’s mass transport phenomena, the temporal
variations of the gravity field, at different temporal and spatial scales,
being caused by mass changes of ice sheets and ice caps, continental water
cycles, ocean masses dynamics and solid-earth deformations. Among the
preparatory studies run within the Earth Observation Programmes Directorate
at ESA, the “Assessment of a Next Generation Gravity Mission for Monitoring
the Variations of the Earth’s Gravity” study represents a milestone: it
consisted of two parallel activities followed by two consortia, involving
European universities and academic institutions for scientific support and
requirement assessments, in addition to experts in mission analysis and
measurement technologies. Several mission concepts have been studied with
well-defined science requirements and accurate sub-system designs: in
addition to the drivers due to tight propulsion requirements and
accelerometer calibration issues, the technical constraints on power and fuel
may dictate the choice of orbit. Thus, for each considered constellation
type, the different interactions between drag-free and “loose” formation
control have been analyzed, together with the design of the relative attitude
control, necessary to ensure the laser link for inter-satellite distance
measurement all along the mission phases.
|
|
报告人
简 介
|
Main
activities and responsibilities - Support to the preparation of Earth
Observation missions in the areas of spacecraft and payload design,
performance analysis and system aspects (detailed satellite configuration,
mass and power specifications, AOCS, data link, P/F trade-off analysis).-
Support to missions under preparations throughout participation to
TEBs,writing/contributing to SOWs and AC papers, submitting and reviewing of
ideas for the TRP Call for Ideas, GSTP proposals, participation to the ESA Harmonization
program and interactions with delegates for work plan justifications,
management of relevant TEC support.
|
