Application Research Of Shipborne Radar Sea Ice Monitoring Technology And Environmental Safety Of Arctic Channel

With the gradual advancement of world economic integration,trade between countries has gradually increased.The Arctic Channel has been attracting attention as a convenient channel connecting Asia,Europe and North America.In addition,the climate of global warming has increased in recent years.The trend is to make the opening of the Arctic waterway into the world’s shipping trend,but the opening of the Arctic channel will undoubtedly bring human activities into the fragile ecosystem of the Arctic.Due to the low temperature throughout the Arctic,the Arctic ice is large,large in area and strong in strength,which is one of the important threats to the safety of the ship’s navigation environment.The maritime accidents caused by the collision between ships and sea ice are also endless in the history of world navigation.The most important thing is the Titanic incident.The maritime accident caused by the collision between the ship and the sea ice will not only cause major economic losses,but also the fuel leakage of the ship caused by the collision and the sinking of the hull will cause a devastating impact on the Arctic ecological environment.Therefore,how to properly avoid the sea ice prevention ship collision accident during the navigation process has become the research focus of the Arctic navigation shipping environment safety.The shipborne radar sea ice monitoring technology studied in this paper is based on the current shipborne navigation radar.The shipborne navigation radar mainly includes three types of X/C/S band types,and remote sensing is performed for different targets and different distances.In this paper,the information related to sea ice in the shipboard X-band radar echo signal is used for signal extraction and data processing.The main focus is on the sea ice image digitization processing to extract sea ice ice type and thickness information,and the drift ice drift vector field velocity measurement and drift prediction.Two aspects.The digital processing of the shipborne radar sea ice image is used to measure the ice type data in the sea area for large-scale acquisition and calculation.The scattering coefficient is used as the main reference basis to extract the sea ice feature quantity,and the sea ice characteristic database is constructed.According to the measurement target echo characteristics and the database information,the ice type interpretation is performed to obtain the sea ice thickness information.This paper mainly takes the sea area of Liaodong Bay in Bohai as an example.A total of more than 500 sets of sea ice samples are collected to form 21 sets of sea ice characteristic value databases including sea conditions and ice table characteristics,and on-site sea ice observation verification experiments are carried out to ensure technical Feasibility and accuracy.The airborne radar drifting vector field velocity measurement and drifting prediction is to use the mutual light interpretation method combined with two consecutive sea ice images to carry out Lagrangian particle analysis to calculate the global sea ice average drifting velocity vector and draw an image,combined with the wind flow field and Surface sea flow field information,using the sea ice dynamic momentum equation for drift ice drift prediction.Taking the sea area of Liaodong Bay in Bohai as an example,this paper analyzes and predicts the direction of sea ice drifting for the velocity vector field of sea ice,and verifies the feasibility and accuracy with the measured values.In summary,based on the sea ice survey data of Liaodong Bay in Bohai Sea,a complete set of shipborne radar sea ice monitoring technology is formed,and the feasibility analysis and parameter correction experiment setting of the Arctic channel sea area are combined to set up the shipping environment safety for the Arctic channel.Provide scientific technical support.