| Statistical Properties of Solar Granulation Derived from the Soup Instrument on Spacelab 2 |
01 JAN 1989 |
22 pages |
| Authors:
A. M. Title; T. D. Tarbell; K. P. Topka; S. H. Ferguson; R. A. Shine; PHILLIPS LAB HANSCOM AFB MA
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 | The Solar Optical Universal Polarimeter (SOUP) on Spacelab 2 collected movies of solar granulation completely free from the distortion and blurring introduced by the Earth's atmosphere. Individual images in the movies are diffraction-limited (30 cm aperture) and are not degraded by pointing jitter. The movies illustrate that the solar 5 minute oscillation has a major role in the appearance of solar granulation and that exploding granules are a common feature ... |
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| Magneto-convection on the Solar Surface |
1989 |
9 pages |
| Authors:
G. W. Simon; A. M. Title; K. P. Topka; T. D. Tarbell; R. A. Shine; S. H. Ferguson; H. Zirin; PHILLIPS LAB HANSCOM AFB MA
|
| We describe and illustrate the first high-resolution observations of horizontal flows on the solar surface and their relation to magnetic field structure seen in the Sun's photosphere. The velocity data were deduced from white-light images obtained by the Solar Optical Universal Polarimeter (SOUP) instrument flown as part of NASA's Spacelab 2 mission. Solar granules were used as tracers to measure larger-scale, longer-lived flows including mesogranules, supergranules, radial outflows from a ... |
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| The Relation between Convection Flows and Magnetic Structure at the Solar Surface |
12 SEP 1988 |
9 pages |
| Authors:
G. W. Simon; L. J. November; L. W. Action; A. M. Title; T. D. Tarbell; K. P. Topka; R. A. Shine; S. H. Ferguson; N. O. Weisst; H. Zirint; AIR FORCE SYSTEMS COMMAND HANSCOM AFB MA GEOPHYSICS LAB
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| We describe recent results from the comparison of data from the Solar Optical Universal Polarimeter instrument of Spacelab 2 and magnetograms from Big Bear Solar Observatory. We show that the Sun's surface velocity field governs the structure of the observed magnetic field over the entire solar surface outside sunspots and pores. We attempt to describe the observed flows by a simple axisymmetric plume model. Finally, we suggest that these observations ... |
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| On the Relation between Photospheric Flow Fields and the Magnetic Field Distribution on the Solar Surface |
15 APR 1988 |
6 pages |
| Authors:
George W. Simon; A. M. Title; K. P. Topka; T. D. Tarbell; R. A. Shine; S. H. Ferguson; H. Zirin; PHILLIPS LAB HANSCOM AFB MA
|
| Using the technique of local correlation tracking on a 28 minute time sequence of white-light images of solar granulation, we have measured the horizontal flow field on the solar surface. The time series was obtained by the Solar Optical Universal Polarimeter (SOUP) on Spacelab 2 (Space Shuttle flight 51-F) and is free from atmospheric blurring and distortion. The SOUP flow fields have been compared with carefully aligned magnetograms taken over ... |
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| Variability of Solar Mesogranulation |
1988 |
5 pages |
| Authors:
G. W. Simon; L. J. November; L. W. Acton; S. H. Ferguson; R. A. Shine; T. D. Tarbell; A. M. Title; K. P. Topka; H. Zirin; PHILLIPS LAB HANSCOM AFB MA
|
| From white-light photographs of solar granulation obtained with the SOUP instrument on Space Shuttle Flight STS-19 we have measured the motions of granules using local correlation tracking techniques. The granules are organized into larger-scale structures (mesogranular and supergranular) which exhibit outflow from upwellings, convergence into sinks, as well as significant vorticity. Magnetic fields follow these same flow patterns. We describe these velocity structures, and suggest that their effect on magnetic ... |
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| Large-Scale Horizontal Flows from Soup Observations of Solar Granulation |
17 SEP 1986 |
9 pages |
| Authors:
L. J. November; G. W. Simon; T. D. Tarbell; A. M. Title; S. H. Ferguson; PHILLIPS LAB HANSCOM AFB MA
|
| Using high-resolution time-sequence photographs of solar granulation from the SOUP experiment on Spacelab 2, we have observed large-scale horizontal flows in the solar surface. Our measurement method is based upon a local spatial cross correlation analysis. The horizontal motions have amplitudes in the range 300 to 1000 m/s. Radial outflow of granulation from a sunspot penumbra into surrounding photosphere is a striking new discover. We see both the supergraulation pattern ... |
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| White Light Movies of the Solar Photosphere from the Soup Instrument on Space Lab 2 |
1986 |
12 pages |
| Authors:
A. M. Title; T. D. Tarbell; G. W. Simon; D. Duncan; PHILLIPS LAB HANSCOM AFB MA
|
| We present initial results on solar granulation, pores and sunspots from the white-light films obtained by the Solar Optical Universal Polarimeter (SOUP) instrument on Spacelab 2. SOUP contains a 30-cm Cassegrain telescope, an active secondary mirror for image stabilization, and a white-light optical system with 35-mm film and video cameras. Outputs from the fine guidance servo provided engineering data on the performance of the ESA Instrument Pointing System (IPS). Several ... |
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