摘要
“神舟3号”(SZ-3)大气密度探测器搭载在SZ-3留轨舱上于2002年3月发射入轨,在轨运行期间获得了轨道舱运行高度范围(330—410 km)内的大气密度数据.数据分析表明,无明显太阳和地磁扰动时,热层大气密度的主要变化之一是日照和阴影区域之间的涨落变化,最大涨落变化比约为3.0,变化比与太阳和地磁活动程度有关.在2002-04-17和2002-04-19的强地磁扰动时,全球热层大气密度上涨,同时在磁扰峰期探测获得30°N—40°N区域出现密度扰动异常现象.对强地磁扰动在运行轨道高度上大气密度最大涨幅约为60％左右,响应过程在时间上要比地磁扰动过程滞后6—7h,日照和阴影区域中大气密度的响应变化程度明显不同.在太阳活动程度发生变化时,热层大气密度会呈现出明显的正相关变化关系.
Atmospheric density detector was on board spacecraft SZ-3 launched on March 2002. At SZ-3 orbit altitude (330--410 km) atmospheric density data were collected near half year. The results show that in the rather quiet period of solar and geomagnetic activity, the difference of the atmospheric density between the sunshine and shade area is one of the principal change of thermosphere density, the highest ratio of atmospheric density in the sunshine to the density in the shade reaches about 3.0, and correlate with solar and geomagnetic activity; During 2002-04-17 and 2002-04-19 two strong geomagnetic disturbance events, the globe thermosphere density obviously increases and amplitude of the increase reached about 60%, and shows a positive correlation with a delay of about 6—7 h; The abnormal disturbance of atmospheric density were observed in the 30°N—40°N during these strong geomagnetic disturbance events; The thermospheric density changes with the value of F_(10.7) which represents the solar activity level and exhibits a obvious correlation.
出处
《空间科学学报》
CAS
CSCD
北大核心
2004年第4期269-274,共6页
Chinese Journal of Space Science
基金
载人航天工程应用项目资助
