The Greenwich Photo-heliographic Results (1874-1976): Initial Corrections to the Printed Publications

被引:28
作者
Erwin, E. H. [1 ]
Coffey, H. E. [1 ]
Denig, W. F. [1 ]
Willis, D. M. [2 ,3 ]
Henwood, R. [4 ]
Wild, M. N. [4 ]
机构
[1] NOAA, Natl Geophys Data Ctr, Boulder, CO 80305 USA
[2] Rutherford Appleton Lab, Space Phys Div, Didcot OX11 0QX, Oxon, England
[3] Univ Warwick, Dept Phys, Ctr Fus Space & Astrophys, Coventry CV4 7AL, W Midlands, England
[4] Rutherford Appleton Lab, UK Solar Syst Data Ctr, Didcot OX11 0QX, Oxon, England
关键词
Greenwich photo-heliographic results; Positions and areas of sunspots and faculae; New digital dataset; Quality control procedures; Printed publications; Typographic errors; Initial corrections; ROTATION VELOCITIES; DIFFERENTIAL ROTATION; MERIDIONAL MOTIONS; SUNSPOTS; POSITIONS;
D O I
10.1007/s11207-013-0310-z
中图分类号
P1 [天文学];
学科分类号
070403 [天体物理学];
摘要
A new sunspot and faculae digital dataset for the interval 1874 - 1955 has been prepared under the auspices of the NOAA National Geophysical Data Center (NGDC). This digital dataset contains measurements of the positions and areas of both sunspots and faculae published initially by the Royal Observatory, Greenwich, and subsequently by the Royal Greenwich Observatory (RGO), under the title Greenwich Photo-heliographic Results (GPR), 1874 - 1976. Quality control (QC) procedures based on logical consistency have been used to identify the more obvious errors in the RGO publications. Typical examples of identifiable errors are North versus South errors in specifying heliographic latitude, errors in specifying heliographic (Carrington) longitude, errors in the dates and times, errors in sunspot group numbers, arithmetic errors in the summation process, and the occasional omission of solar ephemerides. Although the number of errors in the RGO publications is remarkably small, an initial table of necessary corrections is provided for the interval 1874 - 1917. Moreover, as noted in the preceding companion papers, the existence of two independently prepared digital datasets, which both contain information on sunspot positions and areas, makes it possible to outline a preliminary strategy for the development of an even more accurate digital dataset. Further work is in progress to generate an extremely reliable sunspot digital dataset, based on the long programme of solar observations supported first by the Royal Observatory, Greenwich, and then by the Royal Greenwich Observatory.
引用
收藏
页码:157 / 170
页数:14
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