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Testing for lightning as a source of radio bursts observed on the nightside of venus
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Strangeway, R. J. Carpenter, D. L. Sonwalkar, Vikas S. |
| Copyright Year | 1990 |
| Description | In certain previous studies of radio burst events recorded by the Pioneer Venus Orbiting Electric Field Detector (OEFD), data were sorted for statistical purposes according to occurrence at filter band frequencies smaller than or greater than typical values of the ambient electron gyrofrequency. The expectation in making this distinction was that the lowest frequency signals, at 100 Hz, were candidates for propagation through the ionosphere to the spacecraft in the whistler mode, and that the higher frequency signals, if of subionospheric origin, would require some different ionospheric penetration mechanism. On the basis of certain assumptions about the homogeneity and horizontal stratification of the Venusian nightside ionosphere, methods were developed for case-by-case testing of the hypothesis that any particular burst event originated in subionospheric lightning. The tests, which are capable of refinement, allow prediction of the resonance cone angle, refractive index, wave dispersion, and wave polarization. The tests have been applied to data from 11 periods along 7 orbits, and are believed to represent an improved way of categorizing OEFD burst data for purposes of investigating source/propagation mechanisms. Four of the five burst events that were not found consistent with the lightning hypothesis involved receptions at multiple OEFD filter band frequencies. |
| File Size | 3082886 |
| Page Count | 42 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19910002332 |
| Archival Resource Key | ark:/13960/t2m66dq0n |
| Language | English |
| Publisher Date | 1990-11-06 |
| Access Restriction | Open |
| Subject Keyword | Lunar And Planetary Exploration Radio Bursts Venus Atmosphere Refractivity Occurrences Whistlers Wave Dispersion Venus Planet Planetary Ionospheres Lightning Homogeneity Resonance Pioneer Venus Spacecraft Gyrofrequency Stratification Electric Fields Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
