高分辨率機(jī)載InSAR高程距離向空變誤差定標(biāo)方法

洪峻; 曾友兵; 王宇

doi:10.11999/JEIT160021

高分辨率機(jī)載InSAR高程距離向空變誤差定標(biāo)方法

doi: 10.11999/JEIT160021

洪峻¹,
曾友兵^1, ,,
王宇¹

基金項(xiàng)目:

對(duì)地觀測(cè)系統(tǒng)重大專項(xiàng)(GFZX0403220402, GFZX 04032204)

計(jì)量
- 文章訪問(wèn)數(shù): 1408
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- 被引次數(shù): 0
出版歷程
- 收稿日期: 2016-01-08
- 修回日期: 2016-05-20
- 刊出日期: 2016-12-19

Calibration Method of Rang-variant Height Errors in High Resolution Airborne InSAR

HONG Jun¹,
ZENG Youbing^{1
, ,},
WANG Yu¹

Funds:

The National Science and Technology Major Project (GFZX0403220402, GFZX04032204)

摘要

摘要: 高分辨率機(jī)載干涉合成孔徑雷達(dá)(Interferometric Synthetic Aperture Radar, InSAR)是獲取高精度數(shù)字高程模型(Digital Elevation Model, DEM)的重要手段之一。由于主副天線距離向相位方向圖存在差異等原因，導(dǎo)致干涉相位偏差沿距離向變化，而傳統(tǒng)的干涉定標(biāo)方法將干涉相位偏差視為常數(shù)進(jìn)行定標(biāo)，無(wú)法消除干涉相位沿距離向變化的誤差，因此使得定標(biāo)后反演得到的高程存在距離向空變誤差。針對(duì)該問(wèn)題，該文提出一種單獨(dú)將干涉相位偏差沿視角進(jìn)行多項(xiàng)式擬合的定標(biāo)方法。最后，利用一組機(jī)載實(shí)測(cè)數(shù)據(jù)對(duì)該方法加以驗(yàn)證，實(shí)驗(yàn)結(jié)果表明，該方法能有效地解決高分辨率機(jī)載InSAR高程測(cè)量距離向誤差的空變問(wèn)題。
- 干涉合成孔徑雷達(dá) /
- 高分辨率 /
- 干涉定標(biāo) /
- 高程距離向空變誤差 /
- 干涉相位偏差
Abstract: High resolution airborne Interferometric Synthetic Aperture Radar (InSAR) is one of the important methods to generate high precision Digital Elevation Model (DEM). Due to the phase pattern difference between the two antennas, the interferometric phase bias varies with the range. The traditional interferometric calibration regards the phase bias as a constant, and it is not able to correct the range-variant phase errors. Therefore, there are range-variant errors of the reconstructed elevation. To solve this problem, this paper presents a calibration method that uses polynomial to fit the interference phase bias. At last, a set of real airborne InSAR data are used to validate the method, and the experimental results show that the proposed method can solve the problem of range-variant height errors in high resolution airborne InSAR effectively.
- InSAR /
- High resolution /
- Interferometric calibration /
- Range-variant height errors /
- Interferometric phase bias

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