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Compared with current low-Earth-orbit synthetic aperture radar (SAR), geosynchronous SAR (GEO SAR) is featured with its ultrahigh orbit and ultralong integration time. In this letter, we answer the question whether the orbital perturbation items have effects on GEO SAR imaging during the long integration time and, if so, how they produce errors. To achieve these goals, we first develop a perturbing...
SPAM (in this paper esp. refers to rubbish short message) , which affects our information and communication environment, has been paid more and more attention to by the society, the government and telecom operators. SPAM sent by individual subscribers, in particular, is the most important and difficult part in the management of SPAM, and should be realtime controlled in the sending step by a deployed...
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