遙測影像之合成口徑雷達影像幾何處理

Abstract

合成口徑雷達(SAR,Synthetic Aperture Radar)為不受天候及晝夜限制 的主動式微波偵測系統。無論在民事上或軍事上，利用SAR觀念製作高解 析力影像已成為重要的遙測資料來源。由於地表快速變遷且人工日益昂貴 ，利用有效之測量技術協助監測地表之使用具甚高之經濟效益。在測量過 程中不與目標物直接接觸的遙測技術，隨著影像數值化及處理能力的提高 已廣泛地展現在實際的應用上。本文主要在探討ERS-1的MPF(Main ProductionHeader)資料中衛星軌道參數精確度對影像的影響，期能提高 衛星軌道參數的準確度並對影像作幾何校正(Geometric Calibration)， 產生正射化影像和地圖資訊套合(Registration)，然後作資料互補或資料 融合，增進對地表之判讀。 Synthetic Aperture Radar (SAR) is an active microwave remote sensing systemregardless of the influence of weather and the time of detecting. It is a very important source of remote sensing data using SAR to acquire the high-resolution on imagery for general or military purposes. Due to the fact that the land changes rapidly and the cost is increased, the use of effective measuring techniques to survey the land has become more significant. This paper focuses on the precise determination of the satellite orbit parameters from the MPH (MainProduct Header) documented by ERS-1. The main features developed here is for the geometric calibraction of the remote sensing imagery, which contributes to thesatellite orbit precision. Furthermore, affer the preciser orbit parameters aredecided, the resampling imagery makes registration with the relief map. As acomplementary information, the data of the land can be appropriately justifed.