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一種FMCW InSAR系統(tǒng)時變基線估計方法

付希凱,  向茂生,  汪丙南,  蔣帥,  楊玉

付希凱, 向茂生, 汪丙南, 蔣帥, 楊玉. 一種FMCW InSAR系統(tǒng)時變基線估計方法[J]. 電子與信息學(xué)報, 2017, 39(5): 1024-1029. doi: 10.11999/JEIT160763
引用本文: 付希凱, 向茂生, 汪丙南, 蔣帥, 楊玉. 一種FMCW InSAR系統(tǒng)時變基線估計方法[J]. 電子與信息學(xué)報, 2017, 39(5): 1024-1029. doi: 10.11999/JEIT160763
FU Xikai, XIANG Maosheng, WANG Bingnan, JIANG Shuai, YANG Yu. Time-varying Baseline Estimation Method for FMCW InSAR[J]. Journal of Electronics & Information Technology, 2017, 39(5): 1024-1029. doi: 10.11999/JEIT160763
Citation: FU Xikai, XIANG Maosheng, WANG Bingnan, JIANG Shuai, YANG Yu. Time-varying Baseline Estimation Method for FMCW InSAR[J]. Journal of Electronics & Information Technology, 2017, 39(5): 1024-1029. doi: 10.11999/JEIT160763

一種FMCW InSAR系統(tǒng)時變基線估計方法

doi: 10.11999/JEIT160763 cstr: 32379.14.JEIT160763

Time-varying Baseline Estimation Method for FMCW InSAR

  • 摘要: FMCW InSAR系統(tǒng)由于載機平臺高度低，氣流擾動嚴重，位置和姿態(tài)變化大，且微機電系統(tǒng)慣性測量單元(MEMS IMU)測量精度低，導(dǎo)致系統(tǒng)出現(xiàn)較大的時變基線，嚴重影響數(shù)字高程模型(DEM)精度。針對這一問題，該文提出了一種FMCW InSAR系統(tǒng)的時變基線估計方法。首先利用雙通道單視復(fù)圖像數(shù)據(jù)，估計出各個距離門內(nèi)的時變基線導(dǎo)數(shù)，然后建立時變基線的距離向空變模型，利用隨機抽樣一致性檢驗的方法對模型進行求解，解得水平和垂直向的時變基線導(dǎo)數(shù)值，對其積分得到時變基線值。最后通過FMCW InSAR實際數(shù)據(jù)對時變基線進行估計，并與高精度位置和姿態(tài)測量系統(tǒng)(POS)記錄的數(shù)據(jù)進行對比，驗證了所提方法的有效性。
    Abstract: For airborne dual-antenna FMCW InSAR systems, the time-varying baseline can be considerably high due to its low flight height, atmospheric turbulence, location and attitude errors and low accuracy of MEMS IMU, seriously affecting the DEM accuracy. To deal with this problem, a time-varying baseline estimation method for FMCW InSAR system is proposed. Firstly, the time-varying baseline derivative for each range gate using single look complex image data is established, and the space-variant model in range direction is established. Then the horizontal and vertical time-varying baseline derivative obtained using random sample consistent method is integrated. Finally, the proposed method is implemented on real experimental FMCW InSAR data, the effectiveness of proposed method is validated by comparing estimated results with high accuracy POS information.
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出版歷程
  • 收稿日期:  2016-07-20
  • 修回日期:  2016-11-02
  • 刊出日期:  2017-05-19

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