本文選題：像旋 + 無縫�。� 參考：《遙感學(xué)報(bào)》2017年06期

【摘要】：極軌海洋衛(wèi)星的時(shí)間分辨率低,不能及時(shí)感知快速變化的海洋現(xiàn)象及海洋突發(fā)事件,因此,發(fā)展靜止軌道海洋成像輻射計(jì)勢在必行。靜止軌道衛(wèi)星可以長時(shí)間觀測指定海域,但是視場小,需要通過二維指向鏡等方式擴(kuò)大衛(wèi)星的觀測區(qū)域。本文意在通過提出漏掃判斷方法,給出合理的掃描方式,保證高軌面陣掃描無地理信息遺漏。首先,本文在分析二維指向鏡成像原理的基礎(chǔ)上,給出了指向鏡子圖像成像特性以及不同方向、大小的電機(jī)轉(zhuǎn)角所引入的像面旋轉(zhuǎn)。其次,畫出了子圖像的邊界包絡(luò)圖,直觀地給出了掃描角度變化與圖像覆蓋程度的關(guān)系。最后,提出了兩種無縫拼接的判斷方法:柵格法和幾何相交法,柵格法能夠判斷出圖像覆蓋次數(shù),幾何法速度快、準(zhǔn)確度高。實(shí)驗(yàn)結(jié)果表明應(yīng)用本文的兩種方法得到了不同掃描角度間隔下地球邊緣有無漏掃的情況,找到基于本文光學(xué)系統(tǒng)、可覆蓋全球且無縫拼接圖像的最大俯仰、方位轉(zhuǎn)角間隔,為電機(jī)轉(zhuǎn)角步距的設(shè)置提供理論依據(jù),保證不漏掃的同時(shí)提高載荷的時(shí)間分辨率。
[Abstract]:The time resolution of polar orbiting marine satellites is low, so it is necessary to develop geostationary orbit ocean imaging radiometers because they can not perceive the rapidly changing ocean phenomena and ocean emergencies in time. Geostationary satellites can observe the designated sea area for a long time, but the field of view is small, so it is necessary to expand the observation area of the satellite by means of two-dimensional pointing mirror and so on. The purpose of this paper is to provide a reasonable scanning method to ensure that there are no geographical information omissions in high orbit array scanning. Firstly, based on the analysis of the imaging principle of the two-dimensional pointing mirror, the imaging characteristics of the pointing mirror image and the image plane rotation induced by the motor rotation angle in different directions are given. Secondly, the boundary envelope diagram of the sub-image is drawn, and the relationship between the scan angle and the image coverage is presented intuitively. Finally, two kinds of judgment methods of seamless stitching are put forward: grid method and geometric intersection method. Grid method can judge image coverage times, geometric method has high speed and accuracy. The experimental results show that the two methods presented in this paper are used to obtain whether there is a leakage scan on the edge of the earth at different scanning angles. The optical system based on this paper can cover the maximum pitch and azimuth angle interval of the global and seamless stitching images. It provides a theoretical basis for the setting of the angle step of the motor and ensures that the time resolution of the load can be improved while not leaking the sweep.
【作者單位】： 中國科學(xué)院上海技術(shù)物理研究所中國科學(xué)院紅外探測與成像技術(shù)重點(diǎn)實(shí)驗(yàn)室;中國科學(xué)院大學(xué);
【基金】：全球變化與海汽相互作用專項(xiàng)(編號:GASI-03-03-01-01)~~
【分類號】：P715.6;TP391.41;V474.2
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本文編號：1846559