Large-scale propagation properties of interplanetary disturbances revealed from IPS and spacecraft observations
Abstract
Interplanetary scintillation (IPS) observations may be used to study large-scale propagation properties of transient interplanetary disturbances in a three-dimensional manner, although current IPS observations have several limitations, e.g., poor time resolution and line-of-sight integration. Comparative studies with spacecraft solar wind and white-light coronal mass ejection (CME) observations are quite helpful in interpretation of IPS observations. An interplanetary disturbance apparently in association with a disappearing solar filament, which took place near the central meridian of the Sun on late 22 April, 1979, is discussed to examine previous deductions from IPS observations. Three-station IPS observations of the flow speed and spacecraft observations suggest that a quasi-spherical interplanetary disturbance was formed around the Sun-Earth line, whereas the center of the disturbance derived from the distribution of enhanced IPS across the sky (g-maps) is located to the east of the Sun-Earth line.
- Publication:
-
Space Science Reviews
- Pub Date:
- October 1989
- DOI:
- 10.1007/BF00226272
- Bibcode:
- 1989SSRv...51..147W
- Keywords:
-
- Extraterrestrial Radio Waves;
- Interplanetary Space;
- Shock Wave Propagation;
- Solar Wind;
- Electron Density Profiles;
- Satellite Observation;
- Solar Prominences;
- Velocity Distribution;
- Astrophysics