ScanSAR的Scalloping輻射誤差研究
Study on Scalloping Radiometric Error in ScanSAR
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摘要: 由于在觀測(cè)帶內(nèi)采用了多波束掃描的工作模式，使得ScanSAR產(chǎn)生了固有的周期性的scalloping效應(yīng)，影響了ScanSAR的輻射特性。該文基于ScanSAR工作模式的特點(diǎn)，研究了scalloping產(chǎn)生的機(jī)理和性質(zhì)，定量地分析了scalloping引起的輻射誤差以及多普勒中心誤差與scalloping的關(guān)系，并研究了對(duì)scalloping進(jìn)行校正后的剩余誤差問(wèn)題。
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關(guān)鍵詞:
- ScanSAR; Scalloping; 多普勒中心; 輻射誤差
Abstract: Because of the multiple-beam scanning strategy in swath, the intrinsic periodic scalloping exists in ScanSAR, which affects the radiometric property of ScanSAR. Based on the character of ScanSAR, the mechanism and property are studied, radiometric error caused by scalloping and relation between Doppler centroid error and scalloping are quantificationally analyzed. The residual error after correction is also studied. -
魏鐘銓. 合成孔徑雷達(dá)衛(wèi)星. 北京：科學(xué)出版社，2001：216-228.[2]袁孝康. 星載合成孔徑雷達(dá)的ScanSAR技術(shù). 上海航天, 1997，14(2)：52-56.[3]Luscombe A P. Taking a broader view: Radarsat adds ScanSAR to its operation. Proc. IGARSS'88, Edinburgh, Scotland, Sept, 1988：1027-1032.[4]Martyn P, Williams J, Nicoll J, Guritz R. Calibration of the Radarsat SWB processor at the Alaska SAR facility. IGARSS 1999, Hamburg, Germany, June 28 - July 2, 1999: 2355-2359.[5]Eldhuset K, Valand PA. ScanSAR processing and simulation for ASAR using ERS-1 raw data[J].Int. J. Remote Sensing.1995, 16(14):2657-2674 -
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