Title :
Remote sensing by VLF using “Absolute OmniPAL”. 1. Investigation of the decay of sprite plasma
Author :
Dowden, R.L. ; Brundell, B.B. ; Rodger, C.J.
Author_Institution :
Otago Univ., Dunedin, New Zealand
Abstract :
We consider observations by Dowden et al. (1997) of very strong early/fast Trimpis or VLF sprites observed at Darwin, Australia, only 2,000 km from the US Navy transmitter, NWC (21°48´S, 114°9´E). The unperturbed signal strength was about 20 mV/m during the Trimpi observations (at night). The echo amplitudes of the strong Trimpis ranged up to 8 mV/m, some 30 dB stronger than those studied previously in Colorado. The much higher signal/noise ratio enabled accurate measurements of the time variation of the amplitude and phase of the echoes
Keywords :
atmospherics; ionosphere; ionospheric electromagnetic wave propagation; radiowave propagation; Absolute OmniPAL; Trimpi; VLF; VLF sprites; amplitude; decay; echo amplitudes; phase; remote sensing; sprite plasma; time variation; Australia; Noise level; Noise measurement; Phase measurement; Phase noise; Remote sensing; Signal to noise ratio; Sprites (computer); Time measurement; Transmitters;
Conference_Titel :
Mathematical Methods in Electromagnetic Theory, 1998. MMET 98. 1998 International Conference on
Conference_Location :
Kharkov
Print_ISBN :
0-7803-4360-3
DOI :
10.1109/MMET.1998.709760