Advertisement

Interferometers with Complete Coverage of Rectangular Domains in the U,V-Plane

Chapter
  • 114 Downloads
Part of the Astrophysics and Space Science Library book series (ASSL, volume 268)

Abstract

The systems of linear aperture synthesis considered in Chapter 1 enable obtaining full maps of astronomical objects merely when observations of prolonged periods, not shorter than 12 hours, are made. Although these systems provide a high resolution while having a comparatively small number of elements (aerials), they cannot be used in many cases. First, this relates to the study of sources with nonstationary parameters (i.e. altering in time). Second, linear systems are not suitable in the case when observation of many objects in a wide field of view is to be carried out whereas the observing time is limited. Because of the afore-said, the interferometers which allow synthesizing the image of an object in a single exposure (in so-called snapshot regime) are widely employed. Clearly, such systems must be two-dimensional, with a high resolution in the both coordinates. When using two-dimensional (2-D) interferometers, the exposure time is defined by the required signal-to-noise ratio only. If the aerials functioning in the system are sufficiently large and effective, the exposure time may be short enough.

Keywords

Radio Telescope Linear Basis Initial Basis Composite Basis Astronomical Object 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Napier, P. J., Thompson, A. R., Ekers, R. D. The Very Large Array: Design and performance of a modern synthesis radio telescope. Proc. IEEE, 1983, 71, 1295.ADSCrossRefGoogle Scholar
  2. 2.
    Kopilovich, L. E. Optimization of two-dimensional aperture synthesis systems. Soy. J. Communs. Technol. and Electron., 1989, 34, No. 3, 115.Google Scholar
  3. 3.
    Kopilovich, L. E. New approach to constructing two-dimensional aperture synthesis systems. IEE Proc. -F, 1992, 139, 365.Google Scholar
  4. 4.
    Kopilovich, L. E. Optimization of receive element arrangement in aperture synthesis systems. Radiophys. Quantum. Electron., 1988, 31, No. 3, 258.ADSCrossRefGoogle Scholar
  5. 5.
    Baumert, L. D. Cyclic Difference Sets. Lecture Notes in Math., 182, Springer, Berlin, 1971.Google Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2001

Authors and Affiliations

  1. 1.Institute of Radio Physics and ElectronicsNational Academy of Sciences of UkraineKharkovUkraine
  2. 2.Institute of Radio AstronomyNational Academy of Sciences of UkraineKharkovUkraine

Personalised recommendations