近海强干扰区域高频全聚焦SAR波形污染识别与海面高精确提取算法
P229; 获取近海区域,特别是离岸3 km以内的海陆交界区的海面高度信息,一直是卫星测高技术面临的重大挑战.针对这一问题,本文深入研究了全聚焦SAR(fully-focused synthetic aperture radar,FFSAR)测高技术,提出了一种基于污染信号剔除和距离补偿的海面高提取算法,并引入验潮站数据作为独立验证数据,评估了不同沿轨向采样频率(20、80、200及600 Hz)下FFSAR在强干扰海域的测高精度.研究结果表明,在近海1～3 km的强干扰海域:①将FFSAR采样率由20 Hz提升至200 Hz,可以显著提升数据可用性及测高精度.②基于本文算法得到的200 Hz...
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| Published in | 测绘学报 Vol. 54; no. 2; pp. 272 - 285 |
|---|---|
| Main Authors | , , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
河海大学地球科学与工程学院,江苏南京 211100%南京工程学院计算机工程学院,江苏南京 211167
11.03.2025
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1001-1595 |
| DOI | 10.11947/j.AGCS.2025.20240103 |
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| Abstract | P229; 获取近海区域,特别是离岸3 km以内的海陆交界区的海面高度信息,一直是卫星测高技术面临的重大挑战.针对这一问题,本文深入研究了全聚焦SAR(fully-focused synthetic aperture radar,FFSAR)测高技术,提出了一种基于污染信号剔除和距离补偿的海面高提取算法,并引入验潮站数据作为独立验证数据,评估了不同沿轨向采样频率(20、80、200及600 Hz)下FFSAR在强干扰海域的测高精度.研究结果表明,在近海1～3 km的强干扰海域:①将FFSAR采样率由20 Hz提升至200 Hz,可以显著提升数据可用性及测高精度.②基于本文算法得到的200 Hz测高结果与验证数据差异的标准差分别由20 Hz结果的0.36(TGWD)、0.31(EEMSHAVEN)、0.68(DENHELDER)和 0.17 m(IJMON)降至 0.22、0.22、0.48 和0.14 m,精度提升超过20％.③在200 Hz采样率下,相较MWaPP和PP-OCOG算法,本文算法得到的测高结果与验证数据的一致性更高. |
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| AbstractList | P229; 获取近海区域,特别是离岸3 km以内的海陆交界区的海面高度信息,一直是卫星测高技术面临的重大挑战.针对这一问题,本文深入研究了全聚焦SAR(fully-focused synthetic aperture radar,FFSAR)测高技术,提出了一种基于污染信号剔除和距离补偿的海面高提取算法,并引入验潮站数据作为独立验证数据,评估了不同沿轨向采样频率(20、80、200及600 Hz)下FFSAR在强干扰海域的测高精度.研究结果表明,在近海1～3 km的强干扰海域:①将FFSAR采样率由20 Hz提升至200 Hz,可以显著提升数据可用性及测高精度.②基于本文算法得到的200 Hz测高结果与验证数据差异的标准差分别由20 Hz结果的0.36(TGWD)、0.31(EEMSHAVEN)、0.68(DENHELDER)和 0.17 m(IJMON)降至 0.22、0.22、0.48 和0.14 m,精度提升超过20％.③在200 Hz采样率下,相较MWaPP和PP-OCOG算法,本文算法得到的测高结果与验证数据的一致性更高. |
| Abstract_FL | In coastal regions,particularly within 3 km from the coast,the accurate estimation of sea surface height(SSH)has remained a significant challenge for satellite altimetry techniques.This study investigates the fully-focused SAR(FFSAR)altimetry technique and proposes a SSH estimation algorithm based on contamination rejection and range compensation.Tide gauge data are introduced as independent observations to validate the altimetry performance of FFSAR in severe interfered coastal areas under different along-track sampling rates(20,80,200,and 600 Hz).The experiment results show that:① In the highly contaminated region within 3 km from the coast,increasing the FFSAR sampling rate from 20 Hz to 200 Hz signifi-cantly improves data availability and accuracy.② The standard deviations of the altimetry results obtained using the proposed algorithm against the validation data are reduced from 0.36(TGWD)、0.31(EEMSHAVEN)、0.68(DENHELDER)and 0.17 m(IJMON)to 0.22、0.22、0.48 and 0.14 m,respectively,corresponding to an improvement of over 20％.③ At the 200 Hz sampling rate,the altimetry results from the proposed algorithm show better consistency with the validation data com-pared to the MWaPP and PP-OCOG algorithms. |
| Author | 宋敏峰 何秀凤 郑翔天 施宏凯 吴怿昊 |
| AuthorAffiliation | 河海大学地球科学与工程学院,江苏南京 211100%南京工程学院计算机工程学院,江苏南京 211167 |
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| Author_FL | HE Xiufeng SONG Minfeng WU Yihao ZHENG Xiangtian SHI Hongkai |
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| DocumentTitle_FL | Waveform contamination identification and accurate sea surface height extraction algorithm for high-frequency fully-focused SAR in severely in-terfered coastal regions |
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| Keywords | 信号干扰 海面高提取 SAR高度计 coastal area SSH extraction SAR altimetry 近海 signal contamination FFSAR |
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| Title | 近海强干扰区域高频全聚焦SAR波形污染识别与海面高精确提取算法 |
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