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The requirement to the baseline Knowing of a Space VLBI

Published online by Cambridge University Press:  12 April 2016

L.R. Kogan  and
N.A. Eysmont
L.R. Kogan
Affiliation:
Space Research Institute, Profsoyusnaya 84/32, Moscow 117810, USSR
N.A. Eysmont
Affiliation:
Space Research Institute, Profsoyusnaya 84/32, Moscow 117810, USSR

Abstract

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It is shown that the influence of a baseline knowing error on the fringe rate change during coherent averaging time interval is extremely increasing for space VLBI due to more angle velocity of a space baseline rotation comparatively with ground VLBI. It is shown on the example of Radioastron orbit that the reguirement to its orbit for such a short wavelength as 1.35 cm is determined by unknowing of the fringe rate change during coherent averaging time interval rather than by delay ambiguity and this reguirement is equal several meters.

Type
Space-based VLBI
Information
International Astronomical Union Colloquium , Volume 131: Radio Interferometry: Theory, Techniques, and Applications , 1991 , pp. 115 - 118
Copyright
Copyright © Astronomical Society of the Pacific 1991