XỬ LÝ ẢNH RADAR SENTINEL-1 ĐA THỜI GIAN TRONG XÁC ĐỊNH TRỤ ĐIỆN GIÓ TẠI VÙNG VEN BIỂN TỈNH BẠC LIÊU MULTI-TEMPORAL SENTINEL-1 RADAR IMAGE PROCESSING FOR WIND TURBINE DETECTION IN THE COASTAL AREA OF BAC LIEU PROVINCE

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Tác giả: Đức Khánh Ngô, Thùy Linh Phạm Trần

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học Trường Đại học Bạc Liêu, 2024

Mô tả vật lý: tr.24

Bộ sưu tập: Metadata

ID: 483034

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ABSTRACT Bac Lieu province has geographical advantages and is a coastal area with strong and fairly stable winds, less affected by storms. By April 2023, Bac Lieu province had had 8 wind energy farms built and put into operation with 2 farms under construction inland and offshore. The increasing number of wind power projects shows that monitoring the development of wind power projects is essential. The objective of this study is to develop a new method using Sentinel-1 time-series radar images to identify persistent building structures on the sea, specifically wind towers built off the shore of Bac Lieu province. This study used the two-dimensional polarization space method on Sentinel-1 time-series radar images to identify the locations of wind towers off the shore of Bac Lieu province. The results showed that the confounding effects of complex variations in incident and azimuth angles of the Sentinel-1 radar data had been completely eliminated. In addition, the method used in this study was successful in mapping persistent building structures with Sentinel-1 time-series radar image data. The accuracy of results was evaluated by observing and collecting ground truth data in the study area. With very high accuracy, this method can be applied to identify the locations of persistent building structures at sea at other wind farm projects in the future. TÓM TẮT Tỉnh Bạc Liêu có lợi thế về vị trí địa lý và là vùng ven biển có gió mạnh và khá ổn định, ít bị ảnh hưởng bởi bão. Đến tháng 4 năm 2023, tỉnh Bạc Liêu có 8 nhà máy điện gió đã hoàn thành đưa vào hoạt động, 2 nhà máy đang thi công trên đất liền và ngoài khơi. Số lượng dự án điện gió ngày càng tăng cho thấy việc giám sát sự phát triển các dự án điện gió là rất cần thiết. Mục tiêu của nghiên cứu này nhằm xây dựng phương pháp xử lý ảnh vệ tinh viễn thám radar Sentinel-1 đa thời gian để xác định các cấu trúc xây dựng kiên cố trên biển, cụ thể là các trụ tua-bin điện gió được xây dựng tại vùng ven biển tại tỉnh Bạc Liêu. Nghiên cứu này sử dụng phương pháp không gian phân cực hai chiều trên ảnh viễn thám radar Sentinel-1 đa thời gian để xác định vị trí các trụ tua-bin gió. Kết quả của nghiên cứu cho thấy các yếu tố gây nhiễu tín hiệu trên ảnh radar do góc tới của vệ tinh tạo ảnh và do hướng bay của vệ inh ảnh viễn thám radar Sentinel-1 đã bị loại bỏ hoàn toàn. Ngoài ra, phương pháp được sử dụng trong nghiên cứu này đã thành công trong việc lập bản đồ các cấu trúc xây dựng trên biển với dữ liệu ảnh vệ tinh viễn thám radar Sentinel-1 đa thời gian. Kết quả nghiên cứu đã được đánh giá độ chính xác bằng cách quan sát và thu thập dữ liệu thực địa tại khu vực nghiên cứu. Với độ chính xác rất cao, phương pháp này có thể áp dụng cho việc xác định vị trí các cấu trúc xây dựng kiên cố trên biển tại các dự án điện gió khác trong tương lai.

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