AN ANALYSIS OF 1998 LEONID METEOR SHOWER FROM CHINESE VISUAL DATA
xu pin xin (purple mountain observatory; academia sinica; nanjing 210008) he you wen (china research institute of radiowave propagation; xinxiang 453003)

..............page:32-40

ROSAT PSPC OBSERVATIONAL STUDY OF M81 GLOBULAR CLUSTER G35
su yang (beijing astronomical observatory; chinese academy of sciences; beijing 100012 national astronomical observatories; chinese academy of sciences; beijing 100012)

..............page:8-13

A STATISTICS AND ANALYSIS OF INTERNATIONA L EXCHANGE OF PUBLICATIONS OF PMO'S LIBRARY WITH ASTRONOMICAL UNITS ABROAD
zhang lin zhong ( purple mountain observatory ; academia sinica ; nanjing ; 210008)

..............page:65-68

TECHNIQUE FOR SOLAR HIGH ENERGY OBSERVATIONS
chang jin cai ming sheng gan wei qun (purple mountain observatory; academia sinica; nanjing 210008)

..............page:41-51

ON THE PROBLEM IN SOLVING THE EQUATIONS OF THE MOTION OF AN ARTIFICIAL SATELLITE BY NUMERICAL METHODS
liu lin zhang qiang (department of astronomy; nanjing university; 210093)

..............page:14-17

THE RELATIVITY BETWEEN SOLAR ACTIVITY AND TOTAL SOLAR RADIATION
chen xie zhen fan zhong yu (purple mountain observatory; academia sinica; nanjing 210008) zhu sheng ming (meteorological science research institute of jiangsu province)

..............page:2-7

A DESIGN OF A CORRECTOR FOR A 40cm (F/7.5) DOUBLE ASTROGRAPH
zheng gui tang (purple mountain observatory; academia sinica; nanjing 210008)

..............page:27-31

THE CORRELATION BETWEEN MASS EXTINCTIONS AND IMPACTS OF NEAR EARTH OBJECTS THE REVIEW OF SHIVA HYPOTHESIS
su yang1 xia yi2 zhang yan an2 ( beijing astronomical observatory ; chinese academy of sciences; beijing 100012 national astronomical observatories; chinese academy of sciences; beijing 100012)1 ( purple mountain observatory; academia sinica; nanj

..............page:52-64

A NOTE ON THE PROPAGATION OF ANGLE ONLY DATA ERROR IN INITIAL ORBIT DETERMINATION
deng you jun (guangzhou satellite observation station; the chinese academy of sciences; p.o.box 1129; wusan; guangzhou; 510640) (e mail:dengyj@ms.giec.ac.cn)

..............page:22-26

A PRELIMINARY ANALYSIS ON CCD ASTROMETRY OF URANIAN SATELLITES
liu jian rong (shaanxi astronomical observatory; the chinese academy of sciences; lintong; shaanxi; 710600) (united laboratory for optical astronomy; the chinese academy of sciences)

..............page:18-21