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Results with the Extended MERLIN

Published online by Cambridge University Press:  19 July 2016

B. Anderson  and
R. D. Davies
R. D. Davies
Affiliation:
Nuffield Radio Astronomy Laboratories, Jodrell Bank, Macclesfield, Cheshire SK11 9DL, UK

Extract

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A major enhancement of MERLIN completed in 1992 has led to a transformation of its capabilities. The seventh telescope added to the array is a 32-m telescope at Cambridge which provides high sensitivity on all the longest baselines where extra collecting area is especially beneficial. The 32-m telescope is a shaped primary-Cassegrain configuration which achieves an 80 percent aperture efficiency. A change from frequency to amplitude modulation in the microwave links increased the effective bandwidth from 9 to 30 MHz. This broadbanding enables the two hands of circular polarization to be transmitted simultaneously, each in a 15 MHz bandwidth. A further improvement in the system sensitivity was achieved by cryogenically cooling the low noise amplifiers in the front-end receivers.

Type
Imaging Results: Radio and Millimeter Waves
Information
Symposium - International Astronomical Union , Volume 158: Very High Angular Resolution Imaging , 1994 , pp. 343 - 345
Copyright
Copyright © Kluwer 1994 

References

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