A First Look at Magnetic Field Data Products from SDO/HMI

被引：0
|
作者：
Liu, Y. [1 ]
Scherrer, P. H. [1 ]
Hoeksema, J. T. [1 ]
Schou, J. [1 ]
Bai, T. [1 ]
Beck, J. G. [1 ]
Bobra, M. [1 ]
Bogart, R. S. [1 ]
Bush, R. I. [1 ]
Couvidat, S. [1 ]
Hayashi, K. [1 ]
Kosovichev, A. G. [1 ]
Larson, T. P. [1 ]
Rabello-Soares, C. [1 ]
Sun, X. [1 ]
Wachter, R. [1 ]
Zhao, J. [1 ]
Zhao, X. P. [1 ]
Duvall, T. L., Jr.
DeRosa, M. L.
Schrijver, C. J.
Title, A. M.
Centeno, R.
Tomczyk, S.
Borrero, J. M.
Norton, A. A.
Barnes, G.
Crouch, A. D.
Leka, K. D.
Abbett, W. P.
Fisher, G. H.
Welsch, B. T.
Muglach, K.
Schuck, P. W.
Wiegelmann, T.
Turmon, M.
Linker, J. A.
Mikic, Z.
Riley, P.
Wu, S. T.
机构：
[1] Stanford Univ, HEPL, Stanford, CA 94305 USA
来源：
4TH HINODE SCIENCE MEETING: UNSOLVED PROBLEMS AND RECENT INSIGHTS | 2012年 / 455卷
基金：
美国国家科学基金会;
关键词：
LOCAL CORRELATION TRACKING; QUIET ACTIVE REGIONS; SOLAR CORONA; INDUCTION EQUATION; MAGNETOGRAMS; RECONSTRUCTION; AMBIGUITY; MODEL; FLUX;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The Helioseismic and Magnetic Imager (HMI; Scherrer & Schou 2011) is one of the three instruments aboard the Solar Dynamics Observatory (SDO) that was launched on February 11, 2010 from Cape Canaveral, Florida. The instrument began to acquire science data on March 24. The regular operations started on May 1. HMI measures the Doppler velocity and line-of-sight magnetic field in the photosphere at a cadence of 45 seconds, and the vector magnetic field at a 135-second cadence, with a 4096 x 4096 pixels full disk coverage. The vector magnetic field data is usually averaged over 720 seconds to suppress the p-modes and increase the signal-to-noise ratio. The spatial sampling is about 0 ''.5 per pixel. HMT observes the Fe I 6173 angstrom absorption line, which has a Lande factor of 2.5. These data are further used to produce higher level data products through the pipeline at the HMI-ALA Joint Science Operations Center (JSOC) - Science Data Processing (Scherrer et al. 2011) at Stanford University. In this paper, we briefly describe the data products, and demonstrate the performance of the HMI instrument. We conclude that the HMI is working extremely well.
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页码：337 / +
页数：4
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