Loading...
Please wait, while we are loading the content...
Similar Documents
Ionospheric nf sub h resonances: frequency shifts versus plasma conditions
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Benson, R. F. |
| Copyright Year | 1971 |
| Description | The Alouette 2 resonances observed near the harmonics of the electron cyclotron frequency f sub H reveal frequency shifts (relative to the n(f sub H) values derived from model field calculations) which can be interpreted in terms of plasma wave dispersion effects. These effects are observed on the 2(f sub H) resonance when it is near the resonance observed close to the upper hybrid frequency f sub T. The observations suggest that an oblique echo model may be required to give a proper interpretation of the 2(f sub H) resonance. Cyclotron damping can be ignored only when the angle between the propagation vector and the direction perpendicular to the earth's magnetic field B is less than a few degrees for the 2(f sub H) wave, and less than a few tenths of a degree for the n(f sub H) waves with n 2. The negative offset of the absolute value of B inferred from the plasma resonance observations is consistent with expectations based on recent OGO 3 and OGO 5 rubidium magnetometer observations at higher altitudes in the equatorial regions. |
| File Size | 1177141 |
| Page Count | 29 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19720004682 |
| Archival Resource Key | ark:/13960/t6935kr8x |
| Language | English |
| Publisher Date | 1971-10-01 |
| Access Restriction | Open |
| Subject Keyword | Geophysics Cyclotron Radiation Frequency Shift Ogo Plasma Resonance Alouette 2 Satellite Earth Ionosphere Wave Dispersion Electrons Magnetic Measurement Plasma Waves 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 |
