Mathematics – Logic
Scientific paper
Oct 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993graz.iafcq....d&link_type=abstract
IAF, International Astronautical Congress, 44th, Graz, Austria, Oct. 16-22, 1993, 9 p.
Mathematics
Logic
Antenna Arrays, Omnidirectional Antennas, Parabolic Reflectors, Radio Telescopes, Technological Forecasting, Cost Analysis, High Resolution, Sidelobe Reduction
Scientific paper
The time has come to seriously consider a fundamentally different approach for radiotelescopes. Compared to a conventional dish, an Argus timed array provides many advantages, including simultaneous omnidirectional high-gain sky coverage (no scanning), high sensitivity, high resolution, low sidelobes, detection of transient sources, retroactive observations, interference rejection, and high efficiency. An Argus array is less expensive since it takes advantage of mass production; has no large or moving parts; and is unaffected by gravity, sunlight, or wind. The construction cost of a dish increases with time (since labor costs dominate), whereas the construction cost of an array decreases with time (since computing costs dominate). Hence an array must become less costly at some time, even if its other advantages are ignored. We have successfully constructed and operated a prototype eight-element circular Argus array at 162 MHz. Continuing developments in computing power will make large arrays possible, and today modest arrays at lower frequencies are within reach. One fully implemented Argus array can simultaneously carry out all observations now being done by other comparable dish radiotelescopes.
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