A Research Of Parallel Transmission Method For Massive Remote Sensing Data

The development of modern remote sensing technology,making a sharp increase in the current amount of remote sensing data,the amount of data single remote sensing image also increases rapidly.At the same time the scope and areas of national observation satellite remote sensing space systems continues to expand,from small-scale research applications to large-scale business applications,and merging with other information technologies.Application of remote sensing satellite platforms,load,industrial applications and services,commercial evident.According to statistics,there are currently 21 applications vigorous science and technology,public security,health,weather and other needs of remote sensing data.With the increasing demand for these modern society and accelerate the pace of information technology,remote sensing data users expect more convenient in terms of remote sensing data distribution,fast service.Currently in practical applications,remote sensing data distribution method is used in C/S mode.In the C/S mode,when a large number of simultaneously accessing the server,the server load will increase,decrease performance,data distribution rate decrease.To solve these problems,the paper studies the parallel transmission of remote sensing data by analyzing the characteristics of remote sensing data,building on existing mature file transfer technology.Research is divided into two areas,first,based on remote sensing image metadata information to build a database of remote sensing image metadata,metadata database can be achieved through different mechanism of remote sensing resources unified management to integrate dispersed among different institutions remote sensing data resources based on remote sensing image metadata information on-demand remote sensing data extraction,it is obtain the actual scope of the request remote sensing data,reducing the transmission of redundant data.Second,based P2SP file-sharing technology,the parallel transmission algorithm of massive remote sensing data were improved during transmission,depending on the data connection speed change assignments dynamically adjusted data connection to prevent data connect a large number of idle happening appear to improve the transmission speed of the data.On the basis of the research on the realization of a prototype verification system,for the parallel transmission algorithm of massive remote sensing data is feasibility and validity.Experimental results show that this research can effectively improve the speed of distribution of remote sensing data.