Some effects produced by the ionosphere on radio interferometry - Fluctuations in apparent source position and image distortion
Abstract
Quasi-periodic fluctuations in the apparent position of type 1 solar radio sources with periods in the range 12-35 min are reported. These fluctuations are attributed to variable ionospheric refraction on the electron density inhomogeneities connected with the propagation of internal waves in the F2 region. The effects produced by these inhomogeneities on radio heliography are discussed. The observation of these fluctuations is a good means to detect gravity and acoustic waves in the F2 region, and can yield valuable information on their parameters.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- March 1981
- Bibcode:
- 1981A&A....96..259B
- Keywords:
-
- Interferometry;
- Ionospheric Propagation;
- Position Errors;
- Radio Interferometers;
- Satellite Transmission;
- Solar Radio Emission;
- Wave Front Deformation;
- Atmospheric Refraction;
- Electron Density Profiles;
- Error Analysis;
- F 2 Region;
- Gravity Waves;
- Radio Sources (Astronomy);
- Signal Distortion;
- Solar Position;
- Solar Storms;
- Sound Waves;
- Astronomy