Local Time Dependence of Whistler-Mode Waves Produced by Venus Lightning

Details Local Time Dependence of Whistler-Mode Waves Produced by Venus Lightning Local Time Dependence of Whistler-Mode Waves Produced by Venus Lightning

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmae13a0319d&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #AE13A-0319

Statistics

3324 Lightning, 6295 Venus

Scientific paper

Whistler-mode signals associated with atmospheric electrical discharges have been observed at Venus by the Venera landers, Pioneer Venus Orbiter and Venus Express. The Pioneer Venus electric field observations were at low latitudes and only available when the spacecraft was in darkness. The source region of these waves appeared to be in the region 19-23 LT, limited at earlier times by ionospheric propagation. Venus Express observations are obtained by a fluxgate magnetometer and available under all lighting conditions but observations are all at high latitudes. At this location lightning-generated whistler- mode waves are seen only from midnight through noon i.e. on the morning side of the planet. In this study we examine the second year of Venus Express measurements both to verify the statistics of year one and to determine the factors that control the local time occurrence of the signals.

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