3 July 2000 Angular resolution, confusion, and dynamic range constraints on the design of next-generation radio telescopes for centimeter wavelengths
Author Affiliations +
Abstract
The next generation of radio telescopes designed to work at centimeter wavelengths may have collecting areas of up to one million square meters, and in principal will be able to reach radio sources as weak as 100 nanojanskys in 12 hours or a few tens of nanojansky in a few hundred hours integration time. However, special care will be needed to achieve the high angular resolution needed to study individual sources and to reduce the effects of confusion and spurious responses below the thermal noise level. This will require array dimensions up to one thousand kilometers to achieve noise limited performance at 1.4 GHz (20 cm) and up to ten thousand kilometers at 300 MHz (1 meter). But, even then, the performance may be limited by the finite extent of the sources and the consequential blending of their images. A scenario is presented for the gradual implementation of a Square Kilometer Array with global dimensions to give submicrojansky sensitivity over a broad range of angular scales and surface brightness.
© (2000) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Kenneth I. Kellermann, Kenneth I. Kellermann, } "Angular resolution, confusion, and dynamic range constraints on the design of next-generation radio telescopes for centimeter wavelengths", Proc. SPIE 4015, Radio Telescopes, (3 July 2000); doi: 10.1117/12.390427; https://doi.org/10.1117/12.390427
PROCEEDINGS
7 PAGES


SHARE
RELATED CONTENT

Low-frequency lessons from the 74-MHz Very Large Array
Proceedings of SPIE (September 27 2004)
A concept for a thirty-meter telescope
Proceedings of SPIE (July 06 2004)
The Expanded Very Large Array: goals, progress, and plans
Proceedings of SPIE (September 27 2004)
Montage a grid enabled engine for delivering custom science...
Proceedings of SPIE (September 15 2004)
A large single-aperture telescope for submillimeter astronomy
Proceedings of SPIE (September 27 2004)

Back to Top