Title :
Detection of magnetospherically ducted VLF signals geomagnetically conjugate to a Russian Alpha transmitter at L=1.9
Author :
Cohen, Morris B. ; Golkowski, Mark ; Inan, Umran S. ; Parrot, Michel
Author_Institution :
Dept. of Electr. Eng., Stanford Univ., Stanford, CA, USA
Abstract :
The Russian `Alpha´ transmitters broadcast alternating pulses between 11-15 kHz for navigation. A fraction of the VLF energy escapes into the magnetosphere, is guided by ducts, amplified by interaction with radiation belt particles, and observed at the geomagnetic conjugate point. We analyze VLF data from Adelaide, Australia, conjugate to Komsomolsk transmitter. An automated detection scheme separates the subionospheric and magnetospheric signals. We track availability of ducts at L=1.9 and find them present often. We correlate to geomagnetic conditions and assess the role of wave growth and triggering from wave-particle interactions, and compare to DEMETER satellite measurements.
Keywords :
atmospheric techniques; magnetospheric electromagnetic wave propagation; radiation belts; radionavigation; Adelaide; Australia; DEMETER satellite measurements; Komsomolsk transmitter; Russian Alpha transmitter; VLF data; VLF energy; automated detection scheme; frequency 11 kHz to 15 kHz; geomagnetic conjugate point; magnetospheric signals; magnetospherically ducted VLF signals; radiation belt particle interaction; radionavigation; subionospheric signals; wave-particle interactions; Ducts; Educational institutions; Electrical engineering; Magnetic separation; Magnetosphere; Transmitters; USA Councils;
Conference_Titel :
General Assembly and Scientific Symposium, 2011 XXXth URSI
Conference_Location :
Istanbul
Print_ISBN :
978-1-4244-5117-3
DOI :
10.1109/URSIGASS.2011.6051080
