It is of critical importance to know the temporal and spatial character of the isoplanatic patch, in order to access or design pre- or post- detection systems. Here the author reports on progress on a system that uses the edge of the sun as an extended target in order to determine the daytime spatial and temporal characteristics of the isoplanatic patch. The system described uses a pair of linear diode arrays that are aligned along solar radii at points that cross the image of the edge. A...
Topics: DTIC Archive, Title, Alan M, LOCKHEED MISSILES AND SPACE CO INC PALO ALTO CA, *LIGHT TRANSMISSION,...
It is of critical importance to know the temporal and spatial character of the isoplanatic patch, in order to access or design predetection compensation systems. A system which uses the edge of the sun as an extended target in order to determine the daytime spatial and temporal characteristics of the isoplanatic patch is described. Preliminary data gathered at the Rye Canyon Solar Observatory are presented.
Topics: DTIC Archive, Title, Alan M, LOCKHEED MISSILES AND SPACE CO INC PALO ALTO CA PALO ALTO RESEARCH...
The Solar Optical Universal Polarimeter (SOUP) flew on the shuttle mission Spacelab 2 (STS-51F) in August, 1985, and collected historic solar observations. SOUP is the only solar telescope on either a spacecraft or balloon which has delivered long sequences of diffraction-limited images. These movies led to several discoveries about the solar atmosphere which were published in the scientific journals. After Spacelab 2, reflights were planned on the shuttle Sunlab mission, which was cancelled...
Topics: NASA Technical Reports Server (NTRS), POLARIMETERS, SOLAR ATMOSPHERE, SOLAR MAGNETIC FIELD, SOLAR...
We present the first unambiguous detection of quasi-periodic wave trains within the broad pulse of a global EUV wave (so-called EIT wave) occurring on the limb. These wave trains, running ahead of the lateral coronal mass ejection (CME) front of 2-4 times slower, coherently travel to distances greater than approximately solar radius/2 along the solar surface, with initial velocities up to 1400 kilometers per second decelerating to approximately 650 kilometers per second. The rapid expansion of...
Topics: NASA Technical Reports Server (NTRS), EXTREME ULTRAVIOLET RADIATION, PERIODIC VARIATIONS, CORONAL...
In the past decade, the evolution of EUV loops has been used to infer the loop substructure. With the recent launch of High Resolution Coronal Imager (Hi-C), this inference can be validated. In this presentation we discuss the first results of loop analysis comparing AIA and Hi-C data. In the past decade, the evolution of EUV loops has been used to infer the loop substructure. With the recent launch of High Resolution Coronal Imager (Hi-C), this inference can be validated. In this presentation...
Topics: NASA Technical Reports Server (NTRS), EXTREME ULTRAVIOLET RADIATION, HIGH RESOLUTION,...
We have studied an outstanding sequence of continuum images of the solar granulation from Pic du Midi Observatory. We have calculated the horizontal vector flow field using a correlation tracking algorithm, and from this determined three scalar field: the vertical component of the curl; the horizontal divergence; and the horizontal flow speed. The divergence field has substantially longer coherence time and more power than does the curl field. Statistically, curl is better correlated with...
Topics: NASA Technical Reports Server (NTRS), DIVERGENCE, FLOW DISTRIBUTION, MAGNETOHYDRODYNAMICS,...
