【摘要】：星上定標技術(shù)是保障遙感器定量化應(yīng)用的有效手段,目前基于漫射板的星上定標技術(shù)已經(jīng)趨于成熟,其中MODIS以2%～4%的星上定標精度被公認為是最高水平。氣候變化預測和在軌交叉定標等方面研究需要更高的星上定標精度,但是漫射板受自身反射特性變化的影響,使定標精度的進一步提高受到了限制。為滿足科學研究需求,國際上提出了直接觀測太陽的在軌輻射定標方法。該方法避免了因漫射板自身衰變而引起的定標不確定度,有可能使星上定標精度得到一個量級的提升。本文開展了直接觀測太陽的在軌輻射定標方法探索,設(shè)計了定標的總體技術(shù)方案,根據(jù)定標過程中觀測目標的特點,研究了該定標方案所需要的大范圍衰減太陽光的方法,并對衰減因子進行測試。首先,論文計算了該定標方法的典型觀測目標輻亮度,并對結(jié)果進行比較得出直接觀測太陽在軌輻射定標需要將太陽光衰減5個量級;根據(jù)需要的衰減倍數(shù),研究了組合衰減和多孔板衰減兩種太陽光衰減方法,其中組合衰減法通過減小孔徑光闌面積、減小探測器積分時間和加入中性濾光片共同達到衰減要求;多孔板衰減法利用遮擋和衍射來實現(xiàn)衰減。然后,對組合衰減法的衰減因子進行測量,得出組合衰減法可以實現(xiàn)5個量級的衰減,滿足直接觀測太陽星上定標的衰減要求。最后,論文對本次研究的進展以及不足之處進行總結(jié),并提出下一步的研究內(nèi)容。
[Abstract]:On-board calibration technology is an effective means to guarantee the quantitative application of remote sensor. At present, the onboard calibration technology based on diffuse plate has become mature, and MODIS is recognized as the highest level with 2% of on-board calibration accuracy. The prediction of climate change and the cross calibration in orbit need higher calibration accuracy on satellite, but the diffusion plate is affected by the change of its own reflection characteristics, so the further improvement of calibration accuracy is limited. In order to meet the needs of scientific research, a calibration method for direct observation of the sun in orbit is proposed. This method avoids the uncertainty of calibration caused by the decay of the diffusion plate and may improve the calibration accuracy by an order of magnitude. In this paper, the method of direct observation of the solar radiation calibration in orbit is explored, and the overall technical scheme of calibration is designed. According to the characteristics of the observation object in the calibration process, the method of attenuating the solar light in a large range is studied in the light of the characteristics of the observation object in the calibration process. The attenuation factor was tested. First of all, the radiance of the typical observation object of the calibration method is calculated, and the results are compared. It is concluded that the solar radiation calibration for direct observation of the sun in orbit needs to attenuate the solar light by 5 orders of magnitude, according to the attenuation times required, Two kinds of solar attenuation methods, combined attenuation and perforated plate attenuation, are studied. The combined attenuation method can achieve the attenuation requirements by reducing the aperture area, reducing the integral time of the detector and adding the neutral filter. The attenuation of perforated plates is realized by means of occlusion and diffraction. Then, the attenuation factor of the combined attenuation method is measured, and it is concluded that the combined attenuation method can realize the attenuation of five orders of magnitude, which can meet the attenuation requirements of direct observation of the solar star calibration. Finally, the paper summarizes the progress and shortcomings of this study, and puts forward the next research content.
【學位授予單位】：中國科學技術(shù)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TP73

【參考文獻】

相關(guān)期刊論文 前10條

1 程麗鵬;張猛;王高;李仰軍;田苗;;長波紅外探測器的輻射定標[J];科學技術(shù)與工程;2016年28期

2 吳榮華;張鵬;楊忠東;胡秀清;丁雷;陳林;;基于月球反射的遙感器定標跟蹤監(jiān)測[J];遙感學報;2016年02期

3 張志杰;張浩;常玉光;陳正超;;Landsat系列衛(wèi)星光學遙感器輻射定標方法綜述[J];遙感學報;2015年05期

4 孫凌;胡秀清;郭茂華;徐娜;;風云三號A星中分辨率光譜成像儀反射太陽波段的多場地定標跟蹤[J];氣象科技進展;2013年04期

5 胡秀清;孫凌;劉京晶;丁雷;王向華;李元;張勇;徐娜;陳林;;風云三號A星中分辨率光譜成像儀反射太陽波段輻射定標[J];氣象科技進展;2013年04期

6 陳祥子;方偉;王玉鵬;楊振嶺;全向前;;高精度測量孔徑光闌面積方法概述[J];物理學報;2013年16期

7 徐文斌;李健軍;鄭小兵;;激光點陣掃描法絕對定標太陽輻射計直射通道研究[J];光譜學與光譜分析;2013年01期

8 劉寧;陳錢;顧國華;隋修寶;;640×512制冷探測器積分時間與SNR分析[J];紅外與激光工程;2012年01期

9 何波;鄭小兵;李新;李凱;徐文斌;;狹縫光闌面積高精度測量技術(shù)[J];大氣與環(huán)境光學學報;2011年02期

10 盛建軍;張黎明;鄭小兵;李雙;;精確測量孔徑光闌面積的光學方法[J];紅外與激光工程;2008年03期

相關(guān)碩士學位論文 前1條

1 張飛翔;CMOS光電耦合集成電路的設(shè)計與實現(xiàn)[D];電子科技大學;2015年

，

本文編號：2197518