DATA CATALOG OF WDC-D FOR ASTRONOMY

1 Chinese solar geophysical data

Directory entry title: Chinese solar geophysical data

Starting and ending year: 1971-.

Storage medium： Journal

Keywords: Sunspot, Solar flares, Solar radio emission flux, Cosmic ray intensity, Geomagnetic activity indices, Magnetic storms, Solar magnetic fields

Summary: 1.Daily relative sunspot numbers and sunspot areas, daily sunspot ob-servations compiled by Purple Mountain Astronomical Observatory；2.Smoothed (predicted) sunspot numbers； 3. H-Alpha solar flares and in-tervals of H - Alpha flare patrol observation； 4.Observation of magnetic and velocity fields of solar active regions； 5.Solar radio emission flux and solar radio emission outstanding occurrences. Intervals of solar radio emission patrol observation and solar radio emission burst profiles； 6.Cosmic ray meson and neutron intensity compiled by center for space science and applied ； 7.Sudden ionospheric disturbances (D -Region) (SID )； 8. Geomagnetic indices K and A /k ；9.Magnetic storms compiled by Beijing Geomagnetic Observatory； 10.Special issues for the data of some selected events and their corresponding solar-terrestrial effects and preliminary analyses published non-periodically； In addition, the Center provides the predicted smoothed sunspot number and solar activity monthly.

2 Earth rotation parameters from optical astrometry

Directory entry titles: Earth rotation parameters from optical astrometry

Starting and ending year: 1957-

Storage medium: Magnetic tapes and discs

Keywords: Earth rotation parameters

Summary: Earth rotation parameters from optical astrometry including the univer-sal time determined with ten instruments in five observatories and two stations. The coordinates of the epoch pole and the correction of time signals are published for the use in geodesy and exchanged with other na-tions. The universal time will be used for research work of earth rotation and reference frame: (1) Annual report of earth rotation parameters - (UTO-UTC); (2) Monthly bulletin of earth rotation parameters (X,Y); (3)Weekly bulletin of earth rotation parameters； (4) Earth rotation parameters from optical astrometry.