The Reduction And Analysis Of VLBI Data Correlation With DiFX

As the single antenna radio telescopes haven’t satisfy the science requirements with the development of astronomical observation and deep space exploration technology, the VLBI technique emerged from radio interferometer. VLBI can improve the angular resolution because it can equivalent several small radio telescopes to one huge telescope with diameter of thousands of kilometers.After each observation the data of every station must be send to VLBI center for correlative processing, so the correlator is the most important part in the whole system. Di FX is a kind of FX style software correlator which has many advantages, such as ?exible, portable, large capacity, high speed computing and so on. It is one of the most successful software correlator which is running under the distributed computer platform and large computer clusters environment. In this paper I used the Di FX to process the data from one time of CVN observation. The SNR of result has being increased by using the Pulsar Binning mode in Di FX, and I got the high resolution images and accurate positions of pulsars.Compared with previous works from other people, my results are much reliable,and the SNR has being increased obviously.