[天线]Argus: An L-Band All-Sky Astronomical Surveillance System

[post]Abstract—Argus is an experimental antenna array system designed y_Urzgm(  
to demonstrate all-sky monitoring for transient signals in Cb+$|Kg/"b  
the frequency range 1200–1700 MHz. It currently consists of 22 "0#(<zb|  
broadband spiral antennas (expandable to 32) which are individually ~M} K]Li  
instrumented, digitized, and analyzed in an attempt to detect 2gZp O9  
and localize both broadband and narrowband astronomical OW\vbWX  
transients. In this paper, we describe the design of the instrument. ;R#RdUFH  
Notable features include a novel array data aggregation architecture, #G F.M,O/h  
a detection algorithm which does not require accurate calibration U0:*?uA.  
or detailed knowledge of the array manifold, and very low jaKW[@<  
per-element cost of about US$1k/element. A sensitivity of at least aEIz,^3  
661022Wm2Hz1=66kJy(zenith at 1700 MHz 7g+T  
for a 209 ms observation with 60 kHz bandwidth) is achieved for 0+@:f^3]!  
the system as implemented. Performance is demonstrated in an experiment w?|qKO  
in which the Sun is detected, localized, and tracked as it yF.Gz`yi  
moves across the sky. Other experiments confirming the functionality E&y)`>Nq{  
of Argus as an al .. /(hTk&  
j7gTVfO  

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