THE 3.3-MM BRIGHTNESS DISTRIBUTION OF THE QUIET SUN.
Abstract
Center-to-limb brightness distribution measurements of the quiet sun at a wavelength of 3.3 mm show that there is a slight limb brightening at this wavelength. Within the measurement accuracy of the system used, the limb brightening function is only radially dependent. At 3.3 mm, the measurements are consistent with a solar brightness curve that is flat to about r = 0.8 with a rapid increase to a peak value of about 1.3 at the limb. The results show that most of the central disk 3.3-mm emission comes from a thin layer of relatively constant temperature about 1500 to 3500 km above the photosphere. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1969
- Accession Number
- AD0700752
Entities
People
- Fred I. Shimabukuro
Organizations
- The Aerospace Corporation