Title :
Sensitive Broadband ELF/VLF Radio Reception With the AWESOME Instrument
Author :
Cohen, Morris B. ; Inan, Umran S. ; Paschal, Evans W.
Author_Institution :
Dept. of Electr. Eng., Stanford Univ., Stanford, CA, USA
Abstract :
A new instrument has been developed and deployed for sensitive reception of broadband extremely low frequency (ELF) (defined in this paper as 300-3000 Hz) and very low frequency (VLF) (defined in this paper as 3-30 kHz) radio signals from natural and man-made sources, based on designs used for decades at Stanford University. We describe the performance characteristics of the Atmospheric Weather Electromagnetic System for Observation, Modeling, and Education (AWESOME) instrument, including sensitivity, frequency and phase response, timing accuracy, and cross modulation. We also describe a broad range of scientific applications that use AWESOME ELF/VLF data involving measurements of both subionospherically and magnetospherically propagating signals.
Keywords :
amplifiers; atmospheric measuring apparatus; frequency response; ionospheric electromagnetic wave propagation; magnetospheric electromagnetic wave propagation; radio receivers; radiowave propagation; remote sensing; timing; AWESOME instrument; Atmospheric Weather Electromagnetic System for Observation, Modeling, and Education; Stanford University; broadband ELF/VLF radio reception; cross modulation; frequency 3 kHz to 30 kHz; frequency 300 Hz to 3000 Hz; frequency response; magnetospheric propagating signals; phase response; sensitivity; subionospheric propagating signals; timing accuracy; Amplifiers; analog circuits; broadband amplifiers; ionosphere; lightning; low-frequency (LF) radio; magnetosphere; radio receivers; remote sensing; waveguide antennas;
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
DOI :
10.1109/TGRS.2009.2028334
