A New Constellation Architecture for Practical Responsive Revisiting
TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES(2014)
摘要
Responsive communications or Earth surveillance missions typically require frequent revisits to any point on the Earth's surface and employ a constellation with two satellites to improve coverage performance. As a new approach to constellation design, in this paper, a novel constellation is presented by fixing the interval between successive revisits at all latitudes. Analytic and numerical simulations are implemented to illustrate the existence of such a revisiting constellation in a large region parameterized by the relative values of right ascension of ascending node and argument of latitude. We also present a global investigation to address the existence region of the PTR constellation, associated with the relationship between the characteristic parameters and the orbital elements (for example, semi-major axis and inclination). In order to design the stationkeeping strategy for PTR constellation, a new concept of J(2) invariant PTR constellation is introduced. Compared to a single-burn strategy tracking a specified PTR constellation, the improved strategy has a clear competitive advantage of reducing the control frequencies or costs down to one fifth.
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关键词
Constellation Design,Practical Time Resolution (PTR),Practical Constellation Holding the PTRs at All Latitudes
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