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Alternative Title2-D Frequency Spectrum Features and Error Analys isfor In terferometr ic Pass iveM icrowave Imager
潘碑; 吴季; 北京8701信箱
Source Publication遥感技术与应用
Keyword频谱特征 干涉式被动微波成像仪(综合孔径微波辐射计) 天线位置误差 信道幅度和 相位误差 基线缺失 天线方向图误差
Other AbstractThe p rincip le of In terferomet ric Passive M icrow ave Imager (Apertu re Syn thesis In terferomet ric Radiometers ) is to samp le the spat ial f requency spect rum of the f ield of view (FOV ) w ith differen t baselines, each of which is compo sed of a coup le of in terferomet ric an tennas.The output is called visib ility funct ion or spatial sample spect rum. Then, the images of FOV can be recon st ructed w ith differen t algo rithm s and methods, such as Fou rier t ran sfo rmat ion, Clean algo rithm , Max imument ropy method(MEM)and so on.Th is paper in t roduces the basic concep t of In terferomet ric Passive M icrow ave Imager f irst, and p resen t s several featu res of 22D f requency spect rum,from w h ich some special brigh tness dist ribution s of the FOV can be concluded.On basis of tho se featu res, the directions and po sit ion s of baselinesw ith errors can be iden t if ied app rox imately, w hen the o scillat ion s in the recon structed images are obviou s.There are st ill residual system erro rs af ter calib rat ion, which affect the spat ial reso lu t ion, b righ tness reso lu t ion and accu racy. Therefo re,fou r impo rtan t erro rs (an tenna po sit ion erro r, amp litude erro r and phase erro r in channels, and an tenna pat tern erro r),are analyzed in the paper, and baseline ab sence,w h ich can be cau sed by an tenna o r co rrelato r malfunct ion s, is also con sidered. A nd the effect scaused by tho se erro rs in the recon st ructed images, are presen ted.The analyses in the paper can p rovide the evidences to identify the erro r types and sou rces of In terferomet ric Passive Microw ave Imager, and also can supp ly impo rtan treferences to design enhancement algo rithm.
Indexed ByCSCD
Funding Project中国科学院空间科学与应用研究中心
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Document Type期刊论文
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
潘碑,吴季,北京8701信箱. 干涉式被动微波成像仪二维频谱特征及误差分析[J]. 遥感技术与应用,2007,22(3):410-415.
APA 潘碑,吴季,&北京8701信箱.(2007).干涉式被动微波成像仪二维频谱特征及误差分析.遥感技术与应用,22(3),410-415.
MLA 潘碑,et al."干涉式被动微波成像仪二维频谱特征及误差分析".遥感技术与应用 22.3(2007):410-415.
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