2 (2001)

CHINESE ASTRONOMY AND ASTROPHYSICS PERGAMON

Chinese

Astronomy

and Astrophysics

ABSTRACTS CHINESE

OF TWO

JOURNAL

25 (2001)

522-522

OTHER

OF SPACE

PAPERS

SCIENCE

21/2

IN (2001)

A Numerical Research on the White Light Coronagraph Figures Observed on May 2, 1998 YE Zhan-yin, WE1 Feng-si, FENG Xue-shang, SHI Yong & YAO Jiu-sheng (Center

for Space Science

and Applied

Research,

CAS,

Beijing

100080)

A new model of 2-D ideal magnetohydrodynamic equations, which sets spherical coordinates (r, 4) on the sky to avoid singular geometry at solar poles, is employed to simulate white light coronagraph figures. The numerical white light figures of final self-consistent steady state, calculated with initial magnetic field and constructed from a magnetic hexapole and several dipoles as well as with projected characteristic inner boundary condition, basically agrees with observed coronagraph figures. The simulation also shows that magnetic structure

dominates

solar wind flow field. (CJSS,

21, 105-113)

A Comparison of Density and Temperature Profiles Observed by Lidar and Occultation Techniques ZHENG Zhen, HU Xiong, ZHANG Xun-jie (Wuhan Institute of Physics and Mathematics, GAS, Wuhan 430071) & Makoto Abo (Graduate School of Electrical Engineering, Tokyo Metropolitan University, Japan) Comparisons of profiles of the atmospheric density and temperature at heights from 30 to 55 km measured by a Rayleigh with Na lidar and occultation techniques are made preliminarily. The lidar located in Hochioji, Tokyo (35.37” N, 139.23O E) is operated routinely, and the data of occultation are available at almost the same place and at the same time (Oct.14, 1996). This allows us to make comparisons of the results obtained by different techniques. The limits of these two techniques are discussed respectively. The results show a good agreement in both density and temperature profiles. (CJSS, 21, 165-171)

PII: SO275-1062(01)00106-0