Millimeter wave, submillimeter wave
Among radio waves, the electromagnetic spectrum between the wavelengths of 1-10 mm is millimeter wave, and the electromagnetic spectrum below 1 mm is submillimeter wave. ALMA takes these radio waves to depict the dark regions of the universe that are not visible at optical wavelengths.
 Atacama Compact Array
A small-diameter interferometer system deployed to improve the quality of the images from ALMA. It is comprised of twelve ultra-high precision seven-meter diameter antennas and four 12-meter diameter single dish ultra-high precision antennas. It contributes to accurate measurement of the strength of radio waves, as well as the quantitative analysis of material amounts.
Field Programmable Gate Array. A chip whose structure can be configured after it is produced and shipped.
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Date: 14 March, 2013
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