Synoptic charts of coronal holes and 9. 1 cm solar data from May through August 1973

Technical Report · Mon Jan 01 04:00:00 EST 1979

OSTI ID:5874045

Wefer, F L; Papagiannis, M D; Van Steenberg, M E; Varner, T M

The introduction reviews the geomagnetic disturbances due to high-speed solar wind streams produced by coronal holes and discusses the history of radio observations of coronal holes. In the main part of this work, using the central meridian column of the 9.1 cm Stanford solar radio maps, the authors constructed synoptic charts emphasizing temperatures near the quiet solar disk level. Synoptic charts were made for Carrington Rotations 1601-1605 (May - August 1973), which represents the overlapping period from the commencement of solar x-ray data from ATM - Skylab (28 May 1973) to the termination of the Stanford solar radio mapping program (11 August 1973). Synoptic charts of coronal holes were superimposed on the radio charts to determine if the 9.1 cm synoptic charts could be used to identify coronal holes. Their findings lead them to conclude that the 9.1 cm synoptic charts can be of substantial value in identifying large coronal holes, especially during periods of low solar activity. Such synoptic charts, especially during the 1962-65 period of low solar activity, could strengthen the confidence on coronal hole boundaries in the 1960-1973 pre-Skylab period.

• Research Organization: Boston Univ., MA (USA). Dept. of Astronomy
• OSTI ID: 5874045
• Report Number(s): AD-A-063258
• Country of Publication: United States
• Language: English

Related Subjects

640104* -- Astrophysics & Cosmology-- Solar Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DISTURBANCES
GEOMAGNETIC FIELD
MAGNETIC FIELDS
MAIN SEQUENCE STARS
MAPS
SOLAR ACTIVITY
SOLAR CORONA
SOLAR WIND
SOLAR X-RAY BURSTS
STARS
SUN