4Vogt W C.Performance capability of damaged lighter-than-air vehicle operating in the near spaceregime.Ohio:Air force institute of technology graduate school of engineering and management,2009.
5Maryann Law lor.Near space fills communications gap.Signal Magazine,2005,60(3).
4VOGT W C Jr.Performance capability of a damaged lighter-than-air vehicle operating in the near space regime[D].Ohio:Air Force Institute of Technology Graduate School of Engineering and Management (AFIT/EN),2006.
5ERIC R M.Technical feasibility of loitering lighter-than-air near-space maneuvering vehicles[D].Ohio:Air Force Institute of Technology Graduate School of Engineering and Management(AFIT/EN),2005.
6John Pike.RQ-4A Global Hawk(Tier Ⅱ+HAE UAV)[EB/OL].http://www.fas.org/irp/program/collect/global_hawk.htm,17 May 2004.