【摘 要】
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Dear editor,rnSAR tomography(TomoSAR)[1]as an adavnced technique forms an elevation aperture along the elevation direction.Therefore,it has the ability of resol
【机 构】
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College of Electronic Science and Technology,National University of Defense Technology,Changsha 4100
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Dear editor,rnSAR tomography(TomoSAR)[1]as an adavnced technique forms an elevation aperture along the elevation direction.Therefore,it has the ability of resolving layovers,which are common in urban environments.For the moment,To-moSAR is broadly applied to map the urban areas with ex-istence of large quantities of layovers.Let y=[y1,...,yM]T be the measurement vector with M elements,R be the M x N mapping matrix with Rmn=exp(-j2πεmsn)(εm=2b⊥ m/λR0 is the spatial frequency with b⊥ m the spatial perpendicular baseline of the m-th acquisition with reference to the master acquisition,λ be wavelength,R0 be the center slant range),γ=[γ1,...,γN]T be the discretized reflectivity profile with s denoting the discrete elevation po-sitions,w=[w1,...,wM]T be the Mx1 vector representing noise,the signal model of TomoSAR for SAR acquisitions can be represented as y=Rγ+w.
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