Single-dish high sensitivity determination of solar limb emission at 22 and 44 GHz

Details Single-dish high sensitivity determination of solar limb emission at 22 and 44 GHz Single-dish high sensitivity determination of solar limb emission at 22 and 44 GHz

Apr 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986sfcp.nasa..201c&link_type=abstract

In NASA. Marshall Space Flight Center Solar Flares and Coronal Physics Using P/OF as a Research Tool p 201-207 (SEE N86-24614

Astronomy and Astrophysics

Astronomy

3

Mapping, Photosphere, Radii, Radio Astronomy, Solar Limb, Solar Radio Emission, Planetary Limb, Radio Waves, Statistical Analysis, Statistical Distributions

Scientific paper

A large number of solar maps were obtained with the use of Itapetinga 45 ft antenna at 22 GHz and 44 GHz. A statistical study of these maps, reduced using original techniques, permitted the establishment of the solar radius with great accuracy at the two frequencies. It is found that 22 GHz and 44 BHz radiation originates at 16,00 km and 12,500 km above the photosphere, respectively. Excess emission due to active regions was clearly identified at lower solar latitudes above and below the equator, extending up to 26,000 km and 16,500 km above the photosphere, at 22 GHs and 44 GHz, respectively.

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