Tests of Radiometric Phase Correction with ALMA

Details Tests of Radiometric Phase Correction with ALMA Tests of Radiometric Phase Correction with ALMA

Mar 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011msngr.143...11n&link_type=abstract

The Messenger, vol. 143, p. 11-15

Physics

Optics

Scientific paper

Of the many challenges facing ALMA, one of the greatest is overcoming the natural seeing limit set by the atmosphere to achieve very high resolution images. Its longest antenna separations (baselines) permit ALMA to synthesise the effect of a single antenna with a diameter exceeding 15 km, but an accurate radio “adaptive optics” system is required to ensure ALMA's images are diffraction limited. With initial test data now available from the first ALMA antennas in Chile, we describe current progress towards this goal.

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