Joint vector magnetograph observations at BBSO, Huairou Station and Mees Solar Observatory

Creators: Wang, Haimin; Varsik, John; Zirin, Harold; Canfield, Richard C.; Leka, K. D.; Wang, Jingxiu

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Abstract

Joint vector magnetograph observations were carried out at Big Bear Solar Observatory (BBSO), Huairou Solar Observing Station (Huairou), and Mees Solar Observatory (MSO) in late September 1989. Comparisons of vector magnetograms obtained at the three stations show a high degree of consistency in the morphology of both longitudinal and transverse fields. Quantitative comparisons show the presence of noise, cross-talk between longitudinal field and transverse field, Faraday rotation and signal saturation effects in the magnetograms. We have tried to establish how the scatter in measurements from different instruments is apportioned between these sources of error.

Additional Information

© 1992 Kluwer Academic Publishers. Provided by the NASA Astrophysics Data System. Received 13 May, 1991; in revised form 27 April, 1992. We are grateful to the staffs of all three observatories for support during the observations and Bruce Lites for making his Unno code available. We wish to thank the referee for helpful comments. The operation of the BBSO magnetograph and data reduction were supported by NASA under NAGW-1972 and by the NSF under ATM-8816007. Huairou Observing Station is supported by the Chinese National Science Foundation. The operation of the MSO Stokes Polarimeter and data reduction were supported through NASA grant NAGW-1542, and through Lockheed under NASA Contract NAS8-37344 with the NASA Marshall Space Flight Center.

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