3Department of Defense.Plan for operationally responsivespace[R].2007.
4Lang T J.A parametric examination of satellite constellations tominimize revisit time for low earth orbits using agenetic algorithm[J].Advances in Astronautical Sciences,2002,109(1):625-640.
5Williams E A,Crossley W A,Lang T J.Average and maxi-mum revisit time trade studies for satellite constellations usinga multiobjective genetic algorithm[J].The Journal of the As-tronautical Sciences,2001,49(3):385-400.
6Abdelkhalik O,Mortari D.Orbit design for ground surveil-lance using genetic algorithms[J].Journal of Guidance,Con-trol,and Dynamics,2006,29(5):1231-1235.
7Kim H,Jung O.Genetic design of target orbits for a tempora-ry reconnaissance mission[J].Journal of Spacecraft and Rock-ets,2009,46(3):725-728.
8Wertz J R.Levels of responsiveness[EB/OL].http:∥www.responsivespace.com/levelsofresponsiveness.asp.
9Wertz J R.Coverage,responsiveness,and accessibility for va-rious“responsive orbits”[C]∥Proc.of the 3rd AIAA Respon-sive Space Conference,2005.
10Wertz J R,Van Allen R E,Shelner C J.Aggressive surveil-lance as a key application area for responsive space[C]∥Proc.of the 4th AIAA Responsive Space Conference,2006.