空載雷射掃瞄（Airborne Laser Scanning，ALS）技術以GPS的定位和INS的姿態決定可直接推導地面雷射點的高程。理論上，不需要其他輔助方法。目前所有的雷射掃瞄系統皆採用此種方法求得地面點的高程。本論文則利用掃瞄帶重疊的幾何特性提出一套平差模式，研究結合雷射強度與高程資料進行聯合平差計算之可行性，藉以提高空載雷射掃瞄的精度。

　　The airborne laser scanning technique with GPS positioning and INS orientation is useful for height determination ground points. Theoretically , no other auxiliary method is needed. All current developed airborne laser scanning systems are applied the above mentioned method for the height determination. However, we present an adjustment method for sufficiently utilizing the overlaps between the scanning strips in the thesis and study the feasibility of combined computation of laser intensity and height data in order to improve the accuracy of height determination by airborne laser scanning technique.

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