本研究針對Ku 波段地基SAR 在植被覆蓋坡地難以獲取穩定回波的問題，開發可同時支援C 波段衛星SAR 與Ku 波段地基SAR 的雙系統角反射器，並設計實驗探討此角反射器之實用性，最後提出此角反射器之建置標準與使用準則。
本研究將自製之角反射器樣本供衛星SAR 監測，訂定角反射器之形狀與尺寸，並改良幾何設計使其能進行兩兩組合，得到雙系統角反射器之設計雛形 。接著使用衛星SAR 與GB-SAR 對其進行實驗，透過控制角反射器的安裝姿態與植生遮蔽率，模擬角反射器在戶外監測時 ，反射性與監測能力受外部因素影響而改變 ，解此此角反射器對姿態誤差與植生遮蔽率的容許範圍。
GB-SAR 之實驗結果顯示，雙系統角反射器之偏轉小於15°，能提供大於0.9 之同調性；採用孔隙率27.8%的網孔反射板可有效降低風阻、提升角反射器姿態穩定性，且與實心板在同調性表現上相近。於C 波段衛星SAR 監測的植生環境中，若反射單元未受遮蔽，雙系統角反射器可將植生高度低於50cm 區域之同調性提升至0.93 ，約為架設前的2 倍；植生高度低於120 cm 區域之同調性則提升至0.87，較架設前增加0.3 倍。當植生遮蔽反射截面受植生遮蔽，遮蔽面積小於反射截面的10%，仍可提供0.9 以上的同調性。將角反射器安裝於滑動邊坡的植被區域以驗證其監測能力，經過衛星SAR 的監測與PSI 分析，雙系統角反射器能在植被區域提供穩定的反射強度訊號，並作為一長期相干且相位穩定的散射目標，成為干涉分析中的穩定相位參考 ，有效提升植被環境的地表變形監測結果之可靠性與量測精度。
最後統整上述結果 ，提出雙系統角反射器的建制標準與使用準則 ，提供未來地質監測工程實務應用參考。

This study tackles the difficulty of obtaining stable backscatter on vegetated slopes with Ku-band ground-based SAR (GB-SAR) by developing a dual-system corner reflector (CR) compatible with C-band satellite SAR and Ku-band GB SAR. We fabricated CR prototypes for satellite monitoring, specified shape and size, and refined a two-unit combinable geometry. Experiments with satellite SAR and GB-SAR controlled installation orientation, and vegetation occlusion to determine the tolerance ranges.

GB-SAR results show that when the CR’s orientation change is <15°, interferometric coherence exceeds 0.9. Using perforated plates with 27.8% porosity reduces wind load, stabilizes the attitude and yields coherence comparable to that of solid plates. In C-band satellite observations over vegetation, an unoccluded CR raises coherence to 0.93 for areas with vegetation height <50 cm (about twice the baseline) and to 0.87 for areas <120 cm (≈30% above baseline). When vegetation occludes <10% of the CR aperture, coherence remains >0.9.

Deployed on a sliding, vegetated slope, the CR provides stable backscatter and acts as a long-term coherent, phase-stable target, improving PSI results and enhancing the reliability and accuracy of the deformation monitoring. We synthesize these findings into construction standards and operational guidelines for future monitoring.

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