一種合成孔徑雷達(dá)高度計(jì)定標(biāo)方法

諶華; 郭偉; 楊雙寶; 許可; 徐曦煜; 史靈衛(wèi); 王磊

doi:10.11999/JEIT161363

一種合成孔徑雷達(dá)高度計(jì)定標(biāo)方法

doi: 10.11999/JEIT161363 cstr: 32379.14.JEIT161363

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出版歷程
- 收稿日期: 2016-12-13
- 修回日期: 2017-05-15
- 刊出日期: 2017-09-19

A Method of Calibration of SAR Altimeter

摘要

摘要: 合成孔徑雷達(dá)高度計(jì)的關(guān)鍵技術(shù)特點(diǎn)是沿軌向的多普勒銳化和延遲距離校正技術(shù)。兩者的結(jié)合使得其相對(duì)于傳統(tǒng)雷達(dá)高度計(jì)具有沿軌向高分辨率和顯著提高測(cè)高精度的優(yōu)勢(shì)。在2 m波高海況和2 km的地面網(wǎng)格下，其測(cè)高精度可以達(dá)到2 cm。為了驗(yàn)證合成孔徑雷達(dá)高度計(jì)的測(cè)高精度，在充分研究合成孔徑雷達(dá)高度計(jì)測(cè)高原理和傳統(tǒng)雷達(dá)高度計(jì)定標(biāo)方法的基礎(chǔ)上，該文提出一種基于全球?qū)Ш叫l(wèi)星系統(tǒng)(GNSS)浮標(biāo)的合成孔徑雷達(dá)高度計(jì)定標(biāo)方法，采用時(shí)空一致性匹配和多基線聯(lián)合解算方法提高海面高度測(cè)量精度，并將該方法應(yīng)用于合成孔徑雷達(dá)高度計(jì)首次機(jī)載試驗(yàn)中，通過(guò)對(duì)試驗(yàn)數(shù)據(jù)結(jié)果的處理分析，在驗(yàn)證合成孔徑雷達(dá)高度計(jì)測(cè)高精度的同時(shí)，初步驗(yàn)證了該定標(biāo)方法的可行性。
- 合成孔徑雷達(dá)高度計(jì) /
- 波束銳化 /
- 距離校正 /
- 全球?qū)Ш叫l(wèi)星系統(tǒng)浮標(biāo) /
- 定標(biāo)
Abstract: The key invoation technology of Synthetic Aperture Radar ALtimeter (SARAL) are Doppler-beam sharppen and delay/doppler range compensation. The combination of these two technologies makes it has high along-track resolution and high precision in height measurement. On the basis of 2 m sea wave height and 2 km ground grid, the accuracy of sea surface height measured by SARAL will reach 2 cm. In order to verify the accuracy of SARAL, based on a thorough study of the SARAL height measurement principle and traditional radar altimeter calibration method, a calibration method for SARAL based on Global Navigation Satellite System (GNSS) buoy calibration is developed. The method uses temporal and spatial consistency matching and multi- baseline joint solution to improve the accuracy of sea surface height measurement, then it is applied to the first airborne test of SARAL and the first airborne flight experiment data processing. By analyzing the results of airborne flight experiment data, at the same time of validation SARAL measurement precision, the feasibility of the SARAL calibration method is preliminarily verified.
- Synthetic Aperture Radar ALtimeter (SARAL) /
- Beam sharpen /
- Range correction /
- Global Navigation Satellite System (GNSS) buoy /
- Calibration

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參考文獻(xiàn)(18)

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