NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
First results on quiet and magnetic granulation from SOUPThe flight of Solar Optical Universal Polarimeter (SOUP) on Spacelab 2 allowed the collection of time sequences of diffraction limited (0.5 arc sec) granulation images with excellent pointing (0.003 arc sec) and completely free of the distortion that plagues groundbased images. The p-mode oscillations are clearly seen in the data. Using Fourier transforms in the temporal and spatial domain, it was shown that the p-modes dominate the autocorrelation lifetime in magnetic regions. When these oscillations are removed the autocorrelation lifetime is found to be 500 sec in quiet and 950 sec in magnetic regions. In quiet areas exploding granules are seen to be common. It is speculated that a significant fraction of granule lifetimes are terminated by nearby explosions. Using local correlation tracking techniques it was able to measure horizontal displacements, and thus transverse velocities, in the magnetic field. In quiet sun it is possible to detect both super and mesogranulation. Horizontal velocities are as great as 1000 m/s and the average velocity is 400 m/s. In magnetic regions horizontal velocities are much less, about 100 m/s.
Document ID
19880002231
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Title, A. M. (Lockheed Missiles and Space Co. Palo Alto, CA, United States)
Tarbell, T. D. (Lockheed Missiles and Space Co. Palo Alto, CA, United States)
Acton, L. (Lockheed Missiles and Space Co. Palo Alto, CA, United States)
Duncan, D. (Lockheed Missiles and Space Co. Palo Alto, CA, United States)
Ferguson, S. H. (Lockheed Missiles and Space Co. Palo Alto, CA, United States)
Finch, M. (Lockheed Missiles and Space Co. Palo Alto, CA, United States)
Frank, Z. (Lockheed Missiles and Space Co. Palo Alto, CA, United States)
Kelly, G. (Lockheed Missiles and Space Co. Palo Alto, CA, United States)
Lindgren, R. (Lockheed Missiles and Space Co. Palo Alto, CA, United States)
Morrill, M. (Lockheed Missiles and Space Co. Palo Alto, CA, United States)
Date Acquired
September 5, 2013
Publication Date
September 1, 1987
Publication Information
Publication: NASA-Goddard Space Flight Center, Theoretical Problems in High Resolution Solar Physics, 2
Subject Category
Solar Physics
Accession Number
88N11613
Funding Number(s)
CONTRACT_GRANT: NAS8-23805
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Related Records

There are no records associated with this record.
No Preview Available