Helios-1 Faraday rotation experiment: results and interpretations of the solar occultations in 1975.
Abstract
The first of two solar occultations of the satellite Helios-1 in 1975 occurred in April when the satellite's ray path approached the west limb of the sun to a minimum distance of 1.63 solar radii. The second occultation took place in late August/early September when Helios-1 was totally eclipsed by the photosphere. Measurements of the polarization angle of the linearly polarized telemetry signal were performed with automatic tracking polarimeters at the 64 m Goldstone Tracking Station in California and also at the 100 m radio telescope in Effelsberg, West Germany. The coronal Faraday rotation as a function of the solar offset for both occultations is shown in graphs. The theoretical significance of the observations is investigated.
- Publication:
-
Journal of Geophysics Zeitschrift Geophysik
- Pub Date:
- 1977
- Bibcode:
- 1977JGZG...42..659V
- Keywords:
-
- Faraday Effect;
- Helios 1;
- Occultation;
- Polarization Characteristics;
- Satellite Transmission;
- Solar Corona;
- Ray Tracing;
- Solar Magnetic Field;
- Stellar Models