Conventions on thermal expansion modelling of radio telescopes for geodetic and astrometric VLBI

被引：86

作者：

Nothnagel, Axel ^{[1
]}

机构：

[1] Inst Geodesy & Geoinformat, D-53115 Bonn, Germany

来源：

JOURNAL OF GEODESY | 2009年 / 83卷 / 08期

关键词：

Geodetic VLBI; Radio telescopes; Thermal expansion; TEMPERATURE;

D O I：

10.1007/s00190-008-0284-z

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Thermal expansion of radio telescopes has long been recognized as an effect which cannot be neglected in geodetic and astrometric VLBI data analysis if millimeter accuracy is desired. In this article, the author documents the conventions which are being set by the International VLBI Service for Geodesy and Astrometry (IVS) for a consistent modelling of this effect in its routine product generation. For the largest telescopes, the annual cycle of thermal expansion may change the height of the VLBI reference point by as much as 20 mm. However, for telescopes which are used in present-day IVS operations, the variations rather range from 4 to 6 mm.

引用

页码：787 / 792

页数：6

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