A new correlation algorithm of VLBI based on spectrum shift elimination

This paper presents a new algorithm of correlation processing in the domain VLBI(Very Long Baseline Interferometry). For VLBI tracking by cross-cooperation of multi-organizations, the problem of different sampling rate parameter may be encountered. The algorithm in this paper has the advantages of low computational burden and higher accuracy. Because both computational burden and signal-to-noise loss caused by resampling are avoided. For data processing of Venus Express(VEX) experiment, the accuracy of interferogram improved about 10 percent compared with resampling algorithm, and the efficiency improved 20 percent, which testified the effectiveness of our algorithm.