Software Correlator for Radioastron Mission

Journal of Astronomical Instrumentation

Igor A. Girin¹  Andrey S. Andrianov¹  Vladimir I. Kostenko¹  Alexey G. Rudnitskiy¹  Sergey F. Likhachev¹  Vladimir E. Zharov² 

[1] Astro Space Center of Lebedev Physical Institute of RAS, 84/32 Profsoyuznaya st., Moscow 117997, Russia;Physics Faculty, Sternberg Astronomical Institute, Lomonosov Moscow State University, Universitetskij prospect, 13, Moscow 119991, Russia

关键词: Correlator;    Radioastron space mission;    very long baseline interferometry;    radio telescopes;    instrumentation;   

DOI  :  10.1142/S2251171717500040

学科分类：天文学(综合)

来源: World Scientific Publishing Co. Pte. Ltd.

【 摘 要 】

In this paper, we discuss the characteristics and operation of Astro Space Center (ASC) software FX correlator that is an important component of space–ground interferometer for Radioastron project. This project performs joint observations of compact radio sources using 10m space radio telescope (SRT) together with ground radio telescopes at 92, 18, 6 and 1.3 cm wavelengths. In this paper, we describe the main features of space–ground VLBI data processing of Radioastron project using ASC correlator. Quality of implemented fringe search procedure provides positive results without significant losses in correlated amplitude. ASC Correlator has a computational power close to real time operation. The correlator has a number of processing modes: “Continuum”, “Spectral Line”, “Pulsars”, “Giant Pulses”,“Coherent”. Special attention is paid to peculiarities of Radioastron space–ground VLBI data processing. The algorithms of time delay and delay rate calculation are also discussed, which is a matter of principle for...

【 授权许可】

Unknown