极地研究

极地研究 ›› 2019, Vol. 31 ›› Issue (3): 291-300.DOI: 10.13679/j.jdyj.20190005

• 研究论文 • 上一篇    下一篇

基于DPS和GPS的南极中山站电离层TEC比较研究

余侯芳1  陈相材2  刘建军2  何昉2   

  1. 1.中国电波传播研究所, 山东 青岛 266107;
    2.国家海洋局极地科学重点实验室, 中国极地研究中心, 上海 200136
  • 收稿日期:2019-01-22 修回日期:2019-04-14 出版日期:2019-09-30 发布日期:2019-09-30
  • 通讯作者: 陈相材
  • 基金资助:
    国家自然科学基金(41704159, 41431072, 41674169, 41474146, 41874195, 41831072)、国家重点研发计划(2018YFF 01013706, 2018YFC1407303)和科技部重点研发项目(2018YFC1407300)资助

A comparative study of ionospheric TEC derived from DPS-4 and GPS observations at Zhongshan Station, Antarctic

Yu Houfang1, Chen Xiangcai2, Liu Jianjun2, He Fang2   

  • Received:2019-01-22 Revised:2019-04-14 Online:2019-09-30 Published:2019-09-30
  • Contact: Xiang-Cai CHEN

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摘要： 基于南极中山站数字式电离层测高仪DPS-4D和GPS-TEC电离层闪烁监测仪的观测数据, 比较研究了两者在2013年所得电离层总电子含量(TEC)随太阳辐射和地磁活动的日变化和季节变化特征。比较结果表明, 南极中山站上空电离层TEC存在明显的极区电离层变化特性, 这种变化特性大体与太阳辐射成正相关关系, 而与地磁活动成负相关。尽管电离层TEC变化具有明显的晨昏不对称性, 但都能有效地被DPS-4D和GPS TEC监测仪的数据计算获得, 且两者相关系数达到0.86。结合中山站所处的极区电离层位置, 考虑太阳辐射电离和地磁活动影响下的极区电离层对流以及中性大气成分改变, 初步分析了DPS和GPS所得TEC结果有所差异的原因。

关键词: 电离层总电子含量, 临界频率, 极区对流

Abstract: Based on the observations of Digisonde Portable Sounder-4 (DPS-4) and GPS receiver in 2013 at Zhongshan Station, Antarctica, a comparative study on the daily and seasonal variation characteristics of ionospheric total electron content (TEC) with solar flux and geomagnetic activity is carried out. The result shows that the average TEC values have positive correlation with solar flux, whereas it’s negative correlation with geomagnetic activity. Although a dawn/dusk asymmetry of average TEC variations can be easily observed, the average TEC variations between DPS and GPS are trend to be largely agreement and similar, and the linear correlation coefficient is generally 0.86. Factors controlling the agreement are briefly analyzed, including GPS elevation angle, topside contribution to DPS TEC, and the variations of plasma convection and neutral atmospheric composition.

Key words: ionospheric total electron content, critical frequency, polar convection