Research On High Precision Star Table Position Calculation And Real - Time Application In MUSER Data Processing

High precision target position is not only the basic research problem in astronomy, but also an important component in the Mingantu Ultrawide Spectral Radiohelio graph (Mingantu Ultrawide Spectral Radioheliograph, MUSER) observation and data processing. MUSER need target position accuracy can be better than one milli-arcsecond.Aiming at the characteristics of MUSER observation and data processing, this paper mainly discussed a research on High Precision Target Position Computing and Real-time applications in MUSER observation and data processing system. The main achievements are as follows:First, we propose a high-precision position computing method based on the JPL DE405 ephemeris. On the basis of study of NOVAS (Naval Observatory Vector Astrometry Software, NOVAS) ephemeris calculation, combined the specific characteristics of MUSER data processing, using SWIG (Simplified Wrapper and Interface Generator, SWIG) to achieve the method invocation NOVAS package through Python, and finally realized an ephemeris package can be integrated in MUSER data processing system;Second, based on the achieved NOVAS high precision position, comparison and analysis between the different interpolations methods are made. And we mainly design the experiments from the precision and efficiency, so as to compare and analyze the lagrange interpolation, piecewise low-order interpolation (including piecewise linear interpolation, piecewise quadratic interpolation) and cubic spline interpolation;Third, on the basis of the above research, we design and implement a high-precision position real-time release system based on message-oriented middleware (ZeroMQ).This system, as the service instance in the OpenCluster of MUSER, mainly to provide the service of high precision position for the headman, workers and other entities in the distributed computing framework, the realization of this system belongs to MUSER data processing application problems;This paper is a fundamental research in scientific data processing. The related research in the study effectively promoted the construction of MUSER data processing system, and also has some reference value for some problems, such as the high precision target position computing, real-time release and so on.