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

[post]Abstract—Argus is an experimental antenna array system designed >RT02Ey>  
to demonstrate all-sky monitoring for transient signals in ZTSNM)f  
the frequency range 1200–1700 MHz. It currently consists of 22 WAbt8{$D  
broadband spiral antennas (expandable to 32) which are individually i
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instrumented, digitized, and analyzed in an attempt to detect 5eSmyj-W  
and localize both broadband and narrowband astronomical 9G}Crp  
transients. In this paper, we describe the design of the instrument. J\
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Notable features include a novel array data aggregation architecture, >sE{c>R%  
a detection algorithm which does not require accurate calibration 1QH5<)Oa  
or detailed knowledge of the array manifold, and very low VFwp .1oa!  
per-element cost of about US$1k/element. A sensitivity of at least e?~6HP^%.  
661022Wm2Hz1=66kJy(zenith at 1700 MHz T#sKld  
for a 209 ms observation with 60 kHz bandwidth) is achieved for 7L&=z$U@m  
the system as implemented. Performance is demonstrated in an experiment KrT+Svm  
in which the Sun is detected, localized, and tracked as it H23-%+*J  
moves across the sky. Other experiments confirming the functionality i50^%,  
of Argus as an al .. $nbZ+~49  
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