Citation
Abstract
The modelling of doppler noise (RMS phase fluctuation) has enjoyed considerable success via the experimentally observed proportionality between doppler noise and integrated electron density. Recently, theoretically derived models for doppler noise have been proposed. These models are broadly characterized as representing proportionality between doppler RMS phase fluctuation (¢) and particle flux. Under the assumptions of conservation of particle flux in the solar wind and proportionality between electron density and electron density fluctuation, these models yield a doppler noise dependence upon signal closest approach point (a) of: gags Doppler noise observations in the inner corona (rg <a<S5rq) are shown to conclusively demonstrate that doppler noise is proportional to integrated electron density (~a~>}, and not a~!-5, as predicted by the particle flux models. Similarly, spectral broadening in the inner corona is seen to be proportional to integrated density. The article concludes that the particle flux models are in disagreement with the experimental observations of doppler noise to date, and hence are unlikely to be representative of actual solar wind processes.
Details
- Volume
- 42-44
- Published
- April 15, 1978
- Pages
- 197–202
- File Size
- 486.3 KB