本頁重點
What this page shows
GFW 標為「暗船」的 SAR 偵測，先用航港局本地 AIS 重新比對剔除假暗船；剩下的殘餘暗船， 再逐筆裁切 Sentinel-1 雷達影像確認海面上是否真的有船。本頁依成像日期列出每一張比對切片與判定： ✅ 確認實體目標（峰值 ≥ 10× 海面背景）、🟡 弱目標、⚪ 無目標（小型木殼船雷達截面低，SAR 可能拍不到，不等於誤報）。 長度估計誤差約 ±20–30 m；所有結果是研判線索，不是法律認定。
SAR detections GFW flags as "dark" are first re-matched against local Port Bureau AIS to remove false dark vessels; each remaining residual detection is then checked against a cropped Sentinel-1 radar chip to see whether a ship is really there. This page lists every chip and verdict by acquisition date: ✅ confirmed target (peak ≥ 10× sea clutter), 🟡 weak target, ⚪ no target (small wooden hulls have low radar cross-section, so "no target" is not a false alarm). Length estimates are ±20–30 m; results are leads, not legal findings.