資源三號(hào)02星激光測(cè)高儀足印位置預(yù)報(bào)方法
本文選題:激光測(cè)高儀 + 激光足印; 參考:《測(cè)繪學(xué)報(bào)》2017年07期
【摘要】:激光測(cè)高儀在軌幾何檢校是提高激光點(diǎn)平面和高程精度的必要途徑,而激光足印地準(zhǔn)確捕獲是成功開(kāi)展激光測(cè)高儀在軌幾何檢校的前提。本文針對(duì)資源三號(hào)02星搭載的我國(guó)首臺(tái)激光測(cè)高儀的在軌幾何檢校試驗(yàn)需要,在參考光學(xué)遙感衛(wèi)星成像幾何模型的基礎(chǔ)上,提出并構(gòu)建了一套嚴(yán)密的激光足印位置預(yù)報(bào)模型。該模型充分顧及衛(wèi)星平臺(tái)在軌運(yùn)行規(guī)律及激光與衛(wèi)星相對(duì)幾何關(guān)系,建立了激光發(fā)射點(diǎn)到地面足印的嚴(yán)密幾何定位預(yù)報(bào)模型,通過(guò)金字塔地形匹配、基于加速度軌道預(yù)測(cè)以及頻率域姿態(tài)分析分別獲取預(yù)估的激光指向、軌道位置和姿態(tài)信息,實(shí)現(xiàn)地面激光足印的位置預(yù)報(bào)。該模型已應(yīng)用于資源三號(hào)02星激光測(cè)高儀在軌幾何檢校試驗(yàn)中,預(yù)報(bào)的激光足印位置與探測(cè)器捕獲到的實(shí)際位置的最大誤差小于150m,充分驗(yàn)證了預(yù)報(bào)模型的正確性,實(shí)現(xiàn)了我國(guó)遙感衛(wèi)星從天上到地面點(diǎn)對(duì)點(diǎn)的精確預(yù)報(bào),為國(guó)產(chǎn)激光測(cè)高儀在軌幾何檢校提供了有力的技術(shù)支撐。
[Abstract]:The calibration of laser altimeter in orbit is a necessary way to improve the accuracy of laser point plane and elevation, and the accurate acquisition of laser footprint is the prerequisite for the successful calibration of laser altimeter in orbit. In order to meet the need of the in-orbit geometric calibration test of the first laser altimeter carried on the Resource-3 02 satellite, a set of rigorous laser foot-print location prediction model is proposed and constructed on the basis of referring to the optical remote sensing satellite imaging geometry model. This model fully takes into account the orbiting rule of the satellite platform and the relative geometric relationship between laser and satellite, and establishes a rigorous geometric positioning prediction model from laser emission point to ground footprint, which matches the terrain through the pyramid. Based on the acceleration orbit prediction and the frequency domain attitude analysis, the predicted laser pointing, orbit position and attitude information are obtained, respectively, to realize the ground laser foot-print position prediction. The model has been applied to the calibration test of the laser altimeter on the orbit, and the maximum error between the predicted laser footprint position and the actual position captured by the detector is less than 150 m, which fully verifies the correctness of the prediction model. The precise prediction of the point to point from the sky to the ground of the remote sensing satellite in China is realized, which provides a powerful technical support for the calibration of the in-orbit geometry of the domestic laser altimeter.
【作者單位】: 國(guó)家測(cè)繪地理信息局衛(wèi)星測(cè)繪應(yīng)用中心;遼寧工程技術(shù)大學(xué)測(cè)繪與地理科學(xué)學(xué)院;武漢大學(xué)衛(wèi)星導(dǎo)航定位技術(shù)研究中心;
【基金】:國(guó)家高分專項(xiàng)高分遙感測(cè)繪應(yīng)用示范系統(tǒng)項(xiàng)目(AH1601-9) 國(guó)家測(cè)繪地理信息局2016年基礎(chǔ)測(cè)繪科技項(xiàng)目(2016KJ0204) 國(guó)家青年科學(xué)基金(41301525) 國(guó)家自然基金面上項(xiàng)目(41571440) 國(guó)家測(cè)繪地理信息局青年學(xué)術(shù)帶頭人基金(D1501)~~
【分類號(hào)】:P237
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