Computer Science – Performance
Scientific paper
Jul 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992anre.book..227y&link_type=abstract
In its Antarctic Record, Vol. 36, No. 2 p 227-250 (SEE N94-27963 07-46)
Computer Science
Performance
Auroral Absorption, Galactic Radio Waves, Image Processing, Imaging Techniques, Riometers, Antenna Design, Antenna Radiation Patterns, Auroras, Computerized Simulation, Dipole Antennas, Directivity, Radio Receivers
Scientific paper
An eight by eight beam imaging riometer with a view field of 180 km by 180 km, spatial resolution of 20 km, and time resolution of 1 to 4 s was developed in Japan. System design is described with some stress on the difference from the first Imaging Riometer System (IRIS), developed by the University of Maryland. This system has a unique capability of displaying absorption image on the real time basis with the aid of QL (Quick Look) software, which is summarized in a separate paper. The performance of the array antenna system is confirmed by simulation calculations using the galactic radio noise map at 30 MHz obtained by Cane. Procedures for absorption image forming are also described. Some of the absorption images obtained by this system are compared with optical auroral images observed at the same location at the same time. It is found that the both images show a good similarity for morning-side auroras. It is, therefore, concluded that the imaging riometer is a very useful tool for monitoring the auroral form when the optical aurora observation is difficult by the sunlit, or weather condition.
Kato Yasuo
Kikuchi Takashi
Kojima Masayoshi
Nishino Masanori
Sato Mitsugi
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