Imaging of coronal mass ejections by the HELIOS spacecraft
The zodiacal light photometers on board the HELIOS spacecraft can be used to form images of coronal mass ejections in the interplanetary medium. Several aspects of these data are unique: they trace coronal mass ejections using Thomson-scattering techniques to distances from the Sun greater than 0.5 AU; their perspective from the HELIOS orbits allows information to be gained about the three-dimensional shapes of specific mass ejections viewed both by coronagraphs and HELIOS; the global view afforded by the spacecrafts photometers can image the mass ejection from within and thus relate in-situ measurements to the shape of the whole structure. To date, the HELIOS photometers have been used to study coronagraph-observed mass ejections including those that originated at the Sun on 7 May, 24 May, and 27 November, 1979, and 21 May, 18 June, 29 June, and 6 November, 1980. Masses of ejections determined from these data are generally a few times larger than masses determined from SOLWIND coronagraph images.
- Research Organization:
- California Univ., San Diego (USA)
- OSTI ID:
- 6066796
- Report Number(s):
- AD-A-181729/5/XAB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATMOSPHERES
ELECTROMAGNETIC RADIATION
INELASTIC SCATTERING
INTERPLANETARY SPACE
MAIN SEQUENCE STARS
MASS TRANSFER
MEASURING INSTRUMENTS
ORBITS
PHOTOMETERS
RADIATIONS
SCATTERING
SHAPE
SOLAR ACTIVITY
SOLAR CORONA
SPACE
STARS
STELLAR ATMOSPHERES
STELLAR CORONAE
SUN
THOMSON SCATTERING
ZODIACAL LIGHT