臺灣地區JERS-1衛星合成孔徑雷達資料之成像信號處理

Image Formation Signal Processing of the JERS-1 SAR Data in the Taiwan Area

吳坤福(Kuen-Fwu Wu)

指導教授 ： 馬杰

元智大學/工程學院/電機與資訊工程研究所/碩士(1993年)

摘要

合成孔徑雷達(SAR)為一具有全天候監視功能之高解析度微波影像雷達
,在本論文中,進行SAR之理論與其成像原理之探討,並以中央大學遙測中心
所提供的臺灣地區日本地球資源衛星一號(JERS-1)之SAR 回波原始資料進
行成像處理, 依據JERS-1衛星之軌道、波形參數及相對的都卜勒相位資
料 ,對回波原始資料進行方位及距離之FFT快速相關處理、飄移效應補償
及斑駁降低處理, 以產生地球表面之二維影像圖, 最後根據推導出之點目
標回波響應模式, 模擬二個固定點目標, 置入實際回波原始資料中, 並以
相同的成像處理程序, 在正確位置產生兩個點目標的影像點, 以驗證本論
文之理論、成像參數與程式之正確性。本論文以SPARC 10 工作站及 SPW
模擬軟體為工具進行成像處理。

關鍵字

合成孔徑雷達 ； 信號處理 ； 微波成像

並列摘要

Synthetic aperture radar (SAR) is an all day and night survei-
llance radar system capable of producing high resolution
microw- ave imaging. In this paper, we will study the theory
of image formation of the SAR. The Taiwan area SAR data of
Japanese Earth Resources Satellite-1 (JERS-1), which provided
by National Cent- ral University, will be used to do the
image formation signal processing. According to the orbit
parameters of JERS-1, the wa- veforms of SAR and relative
Doppler phase between satellite and earth, the FFT correlation
algroithm is used to compress the raw echo data of SAR in range
direction and azimuth direction to ge- nerate the two dimension
image of the earth surface. The range compensation of the
migration effect and speckle reduction are also implemented
to make the image more clear. The model of point target
response of the SAR is used to generate two point targets to
combine with the raw data of SAR on JERS-1. The same procedu-
res of the image formation signal processing are applied for
the combined data to produce the image of the earth surface
and two point targets. The correct position of the two point
targets in the image of the earth surface verified that the
parameters of satellite, waveforms of SAR and the simulation
program are all correct. The SPARC 10 workstation and the SPW
software are the tools for the implementations of the image
formation signal pro- cessing.

並列關鍵字

SAR ； signal Processing ； microwave imaging