發(fā)布時(shí)間：2018-01-08 04:04

  本文關(guān)鍵詞：高分CMOS相機(jī)垂軌引導(dǎo)凝視搜索成像設(shè)計(jì)　出處：《光學(xué)學(xué)報(bào)》2017年07期 　論文類型：期刊論文

  更多相關(guān)文章： 成像系統(tǒng) 垂軌搜索 推凝視 重疊率 像移量 調(diào)制傳遞函數(shù)

【摘要】：為實(shí)現(xiàn)高分面陣相機(jī)對(duì)垂直軌道方向的長(zhǎng)條帶區(qū)域一定重疊率的凝視搜索成像,設(shè)計(jì)了凝視姿態(tài)與地速運(yùn)動(dòng)互補(bǔ)償?shù)拇管壞曀阉髂Ｐ汀Ｍㄟ^(guò)劃分垂軌長(zhǎng)條帶區(qū)域與構(gòu)建目標(biāo)三維運(yùn)動(dòng)速度,設(shè)計(jì)成像實(shí)時(shí)姿態(tài)變化與地球自轉(zhuǎn)互補(bǔ)償?shù)囊龑?dǎo)策略,計(jì)算垂軌自適應(yīng)搜索成像參數(shù)與實(shí)時(shí)變化指向姿態(tài),并對(duì)衛(wèi)星姿控精度對(duì)成像的影響進(jìn)行了分析。最后,利用姿控三軸氣浮仿真系統(tǒng)與CMOS相機(jī)對(duì)曲面LED目標(biāo)模擬系統(tǒng)進(jìn)行等比縮放物理仿真實(shí)驗(yàn)。結(jié)果表明:垂軌凝視自適應(yīng)搜索成像參數(shù)為0.95時(shí),可實(shí)現(xiàn)垂軌方向邊緣幀間重疊率為85%、中心幀間重疊率為100%的漸變垂軌長(zhǎng)條帶成像區(qū)域,比全凝視成像區(qū)域擴(kuò)大近4倍,姿控精度和姿態(tài)穩(wěn)定性優(yōu)于0.05°與0.003(°)s~(-1)時(shí),像移失配量小于0.9pixel,對(duì)應(yīng)的調(diào)制傳遞函數(shù)值為0.1559。
[Abstract]:In order to realize the staring search imaging of the long strip region in the vertical orbit direction of the high plane array camera with a certain overlap rate. The searching model of vertical orbit gazing is designed, which compensates the gazing attitude and the ground velocity. By dividing the vertical rail strip region and constructing the target 3D velocity. Design the guidance strategy of imaging real-time attitude change and earth rotation compensation, calculate the vertical orbit adaptive search imaging parameters and real-time change pointing attitude, and analyze the influence of satellite attitude control accuracy on the imaging. Finally. By using the attitude control three-axis air flotation simulation system and the CMOS camera, the physical simulation experiment of the curved surface LED target simulation system is carried out. The results show that the vertical orbit gaze adaptive search imaging parameter is 0.95. The vertical rail edge frame overlap rate is 85 and the center frame overlap rate is 100%, which is nearly four times larger than the full gaze imaging area. When the precision of attitude control and attitude stability are better than 0.05 擄and 0.003 (擄~ 0. 003), the mismatch of image shift is less than 0.9 pixel, and the corresponding value of modulation transfer function is 0.1559.
【作者單位】： 中國(guó)科學(xué)院長(zhǎng)春光學(xué)精密機(jī)械與物理研究所;小衛(wèi)星技術(shù)國(guó)家地方聯(lián)合工程研究中心;長(zhǎng)春理工大學(xué)理學(xué)院;中國(guó)科學(xué)院大學(xué);
【基金】：國(guó)家自然科學(xué)基金青年基金(61503360)
【分類號(hào)】：TP751;V443.5
【正文快照】： 3中國(guó)科學(xué)院大學(xué),北京100049;4小衛(wèi)星技術(shù)國(guó)家地方聯(lián)合工程研究中心,吉林長(zhǎng)春1300330711002-1隨著全球高分辨率遙感推掃衛(wèi)星全面進(jìn)入亞米級(jí)分辨率時(shí)代,2013年,Skybox imaging公司發(fā)射了首顆SkySat米級(jí)視頻衛(wèi)星,該衛(wèi)星對(duì)地觀測(cè)記錄了運(yùn)動(dòng)目標(biāo)信息,開創(chuàng)了動(dòng)態(tài)遙感的新紀(jì)元。視頻

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