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題 名 | RADARSAT-1 SAR立體像對前方交會定位=Space Intersection Using Stereo RADARSAT-1 SAR Image Pairs |
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作 者 | 陳浦淮; | 書刊名 | 測量工程 |
卷 期 | 42:4 2000.12[民89.12] |
頁 次 | 頁1-16 |
分類號 | 440.98 |
關鍵詞 | 遙測; 合成口徑雷達; 立體觀測; 雷達衛星; Remote sensing; SAR; Stereoscopy; RADARSAT-1; |
語 文 | 中文(Chinese) |
中文摘要 | 受限於對大量地面控制點之倚賴,現階段應用太空立體合成口徑雷達影像於遙測定位之演算法,仍未充分開發其應用潛力。尤其引入不良地控點於空間定位程序,不僅易扭曲遙測資訊粹取成果,亦徒增作業成本。為降低對地面控制點倚賴,減少引入不良地控點之風險,本文提出一雷達測量前方交會演算法,不直接引入地控點於平差計算程度;亦即先進行無地控點之地面點座標解算,其後配合極少量地控點應用於系統改正,以提升太空雷達遙測影像應用之效能。本文以RADARSAT-1 SAR立體像對為例進行遙測定位,驗證所提方法僅需兩個全控點,即可有效改正系統誤差。32個檢核點定位成果統計資料顯示,平面各維度誤差為20~27m,高程誤差為11~20m。計算所得娛差大小與RADARSAT-1 SAR之標準影像解析度(25m)相似。 |
英文摘要 | The requests of ground control points (GCPs) in the currently available algorithms of radargrammetry limit the applications of space-borne SAR imagery in space cartography. In particular, using the GCPs of inferior quality in radargrammetric algorithms is liable to degrade the resultant quality and to increase the cost of operation. In order to be independent of GCPs and to get rid of the influence from the GCPs of inferior quality, a rigorous radargrammetric algorithm is proposed in this paper. Using a least squares adjustment, the proposed space intersection algorithm firstly solves the co-ordinates of the desired ground points, and then the remaining systematic shifts are corrected independently with two GCPs only. The proposed method is verified using stereo Pairs of RADARSAT-1 SAR imagery. According to the statistics of the calculated results of 32 check points, the RMS error is derived as 20-27m in plane and 11-20m in height. Generally, the quality of the calculated results is reasonable in respect to the nominal resolution of RADARSAT-1 SAR standard imagery which is quoted as 25m. |
本系統中英文摘要資訊取自各篇刊載內容。