Z mode radio sounding from IMAGE of field aligned electron density and ducts
- Resource Type
- Conference
- Authors
- Sonwalkar, Vikas; Mayank, Kumar; Reddy, Amani
- Source
- 2014 XXXIth URSI General Assembly and Scientific Symposium (URSI GASS) General Assembly and Scientific Symposium (URSI GASS), 2014 XXXIth URSI. :1-3 Aug, 2014
- Subject
- Bioengineering
Communication, Networking and Broadcast Technologies
Components, Circuits, Devices and Systems
Fields, Waves and Electromagnetics
Photonics and Electrooptics
Signal Processing and Analysis
Ducts
Magnetic field measurement
Density measurement
Cavity resonators
Magnetosphere
Satellites
Satellite broadcasting
- Language
Radio sounding from IMAGE has led to the observations of a large variety of ducted and nonducted fast Z mode echoes. The ducted echoes were observed when IMAGE was located inside a Z mode “cavity,” whereas the nonducted echoes were observed both inside and outside of the cavity. We present a new ray tracing method to measure field aligned electron density and duct and Z mode cavity parameters from the observed cutoff frequencies and dispersion of the ducted and nonducted fast Z mode echoes. The method is applied to four case studies to obtain field aligned electron densities and duct parameters. Our results demonstrate that Z mode radio sounding observations from IMAGE provide a powerful new way to measure field aligned electron density and duct parameters that play important roles in the physics of whistler and Z mode wave propagation, wave particle interactions, and that of ionosphere magnetosphere coupling.