Computer Science
Scientific paper
Jul 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010spie.7733e..37w&link_type=abstract
Ground-based and Airborne Telescopes III. Edited by Stepp, Larry M.; Gilmozzi, Roberto; Hall, Helen J. Proceedings of the SPIE,
Computer Science
Scientific paper
The CARMA telescope is a heterogeneous array of 10.4, 6.1 and 3.5 m antennas, with antenna configurations providing spacings from ~3.5 m to 2 km. This heterogeneous array is well suited to imaging a wide range of spatial scales. In compact configurations the heterogeneous array provides high quality short spacing data for aperture synthesis. In extended configurations, the antennas can be paired, with 6.1 and 10.4m antennas making science observations in the 3 mm and 1 mm bands, while 3.5 m antennas are simultaneously observing calibration sources within a few degrees in the 1 cm band. This unique Paired Antenna Calibration System allows us to to correct for atmospheric phase fluctuations and make images at 0.15 arcec resolution in a wide range of atmospheric seeing conditions. In this paper we discuss some results and lessons learned using these heterogeneous observing techniques. These results are relevant to all aperture synthesis arrays, including millimeter/submillimeter wavelength arrays like ALMA, and cm/m wavelength arrays like ATA and SKA.
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