The Designing And Implementation Of The Displaying Software For High Frequency Radar

HF ground wave radar can be used for ocean remote sensing,and real-time access to a large number of marine information data.HF ground wave is widely used in marine environmental monitoring and marine weather forecast.The software is on the basis of terminal display software of Wuhan University.The software solves the issues that the user interface is not friendly.The displaying software for HF ground wave radar,it is a goal to ensure the boring processed ocean data intuitive displayed to the user from the two aspects which include 2D map and 3D map.This paper mainly focuses on the design and implementation of the displaying software for HF ground wave radar,which is based on a series of problems in the process of using the original displaying software.Firstly,this article introduces the background of the topic selection and the development of the displaying software at home and abroad.Secondly,according to the business requirement,we choose the appropriate technology to achieve the module.Thirdly,the demand modeling and process modeling of the software are carried out by using the use case diagram and the data flow graph which are based on analyzing the specific business functions.The software is divided into five function modules,such as interface displaying module,2D map data processing module,3D map data processing,module,ocean data processing module and historical data storing module.Fourthly,the paper gives the overall architecture of the software.The framework of model/view is used to divide the display interface and the separation process.According to the business requirement,we choose the appropriate technology to achieve the module.QT4 development technology is used to develop the interface displaying module.Mercator projection,Miller projection and the customized coordinate transformation algorithm,,are used to develop the module of map data processing.The ocean data processing module process kinds of sea data(including radial flow field,vector flow field,wave field and wind field),which adopts the Open GL and the linear interpolation algorithm.The background database adopts the SQLite database as the tool to store historical information.Finally,the test case is used to test the software.The function test is carried out,it compares expected result and final result.The software has been tested and can be used normally.Later we will expand and improve it from the software security and 3D ocean data.With the ocean data in-depth measurement,we can adjust the function of the system to increase its flexibility,the system will constantly optimize and upgrade in practice.