自Mattie and Harris（1978）利用各種頻率範圍的雷達波來觀測波浪，分析結果發現X-Band微波雷達適合用於海面波浪之觀測。近年來X-band微波雷達應用在海洋觀測上越來越常見，藉由雷達回波訊號及影像可間接分析海面上波浪之特性。海氣象參數（如：氣溫、水溫、風速等）影響海表面粗糙度，進而影響X-Band微波雷達的觀測。本文探討興達港海域大範圍X-band微波雷達回波訊號強度，搭配氣象站與浮標海氣象參數資料進行分析比較，在固定氣溫下，比較不同風速與X-band微波雷達回波強度間之關係，另以蒲福風級表將風速資料分級並比較在同一風級下，大氣及水溫的溫度差與X-band微波雷達回波強度間之關係。此外，在雷達影像上觀測到廢水排放出水口處有一異常影像，並以一筆現場廢水排放出水口處實測水溫資料進行分析，結合氣象站氣溫資料與CRC Handbook of Chemistry and Physics中水溫及表面張力的理論值得到溫度差與表面張力，進而探討實測水溫、大氣及水溫的溫度差、表面張力與X-band微波雷達回波強度間之關係。

Since Mattie and Harris (1978) used different frequency bands of radar for observing the waves, the X-Band microwave radar has been applied for observing the sea waves. In recent years, the X-band microwave radar applications are becoming more common on the ocean observing. We can analyze the characteristics of the sea waves indirectly by the radar sea return signals. Sea and Meteorology parameters such as air temperature, water temperature, wind speed, etc. affect the sea surface roughness and the X-Band microwave radar observations.
This study explores the X-band microwave radar sea return with weather stations and buoys data collected at Xingda Harbour sea area. The data analysis is divided into two parts: The first part compares the relationship between wind speed and radar sea return in the same air temperature. The other part compares the relationship between radar sea return and the difference between air and sea temperatures in the same wind speed. In addition, there are unusual radar sea return signals on the radar image nearby the place of the wastewater emissions. And the study explores the X-band microwave radar sea return with water temperature, the difference between air and sea temperatures, and the surface tension by using measured water temperature, the surface tension of CRC Handbook of Chemistry and Physics and the air temperature of weather stations.

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