Mosaic CCD method: A new technique for observing dynamics of cometary magnetospheres

Details Mosaic CCD method: A new technique for observing dynamics of cometary magnetospheres Mosaic CCD method: A new technique for observing dynamics of cometary magnetospheres

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992acm..proc..529s&link_type=abstract

In Lunar and Planetary Inst., Asteroids, Comets, Meteors 1991 p 529-532 (SEE N93-19113 06-90)

Computer Science

Austin Comet, Cameras, Charge Coupled Devices, Comet Tails, Cometary Magnetospheres, Imaging Techniques, Magnetohydrodynamic Flow, Microstructure, Photographs, Plasmasphere

Scientific paper

On April 29, 1990, the plasma tail of Comet Austin was observed with a CCD camera on the 105-cm Schmidt telescope at the Kiso Observatory of the University of Tokyo. The area of the CCD used in this observation is only about 1 sq cm. When this CCD is used on the 105-cm Schmidt telescope at the Kiso Observatory, the area corresponds to a narrow square view of 12 ft x 12 ft. By comparison with the photograph of Comet Austin taken by Numazawa (personal communication) on the same night, we see that only a small part of the plasma tail can be photographed at one time with the CCD. However, by shifting the view on the CCD after each exposure, we succeeded in imaging the entire length of the cometary magnetosphere of 1.6 x 106 km. This new technique is called 'the mosaic CCD method'. In order to study the dynamics of cometary plasma tails, seven frames of the comet from the head to the tail region were twice imaged with the mosaic CCD method and two sets of images were obtained. Six microstructures, including arcade structures, were identified in both the images. Sketches of the plasma tail including microstructures are included.

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