空间科学学报2025，Vol.45Issue(4)：987-994,8.DOI:10.11728/cjss2025.04.2024-0075
西北走廊地区电离层吸收特性研究
Study on Ionospheric Absorption Variation Characteristics in the Northwest Corrido
辛浩 1赵海生 2王俊江 3葛淑灿3
作者信息
- 1. 平顶山工业职业技术学院现代教育技术中心 平顶山 467001
- 2. 中国电波传播研究所电波环境特性及模化技术重点实验室 青岛 266107||海南大学电子科学与技术学院 海口 570228
- 3. 中国电波传播研究所电波环境特性及模化技术重点实验室 青岛 266107
- 折叠
摘要
Abstract
Ionospheric fmin is the lowest echo frequency observed on the frequency height map,which is an important index of the performance of the ionosonde and also an important index for the study of the absorption effect in the ionospheric D region.In this paper,the ionospheric absorption intensity,spa-tial distribution,diurnal variation,seasonal variation and long-term variation are studied by using iono-spheric fmin data from Xi'an,Urumqi and Lanzhou stations of China ionospheric vertical survey network in the Northwest Corridor region.The study of ionospheric absorption variation is of great application value to the selection of the lowest frequency of shortwave communication,the evaluation of detection performance of sky-wave over-the-horizon radar and the prediction of VLF telecommunication efficiency.At the same time,ionospheric absorption is closely related to the electron density of the D layer,which is an important indicator of the intensity of the electron density of the D layer.To study the ionospher-ic absorption characteristics is of great scientific significance for the study of the ionospheric variation characteristics and the establishment of the electron density distribution model in the D region.The ab-sorption effect of ionospheric region D in the Northwest Corridor mainly occurs in the daytime,with the highest absorption intensity at noon and the weakest in the early morning at night.Meanwhile,the ab-sorption effect of ionospheric region D in the Northwest Corridor has significant seasonal variation char-acteristics,the strongest in summer and the weakest in other seasons.The ionospheric fmin value of Urumchi at higher latitude is obviously higher than that of Xi'an and Lanzhou at middle latitude,and the absorption effect center has obvious diurnal drift characteristics.The absorption of ionospheric re-gion D in the Northwest Corridor is positively correlated with the intensity of solar activity.In particu-lar,the absorption intensity of ionospheric region D in high solar activity years is significantly higher than that in low solar activity years.关键词
西北走廊/电离层fmin/日变化/季节变化/长期变化/空间分布Key words
Northwest corridor/Ionospheric fmin/Daily variation/Seasonal change/Long-term trend/Spatial distribution分类
天文与地球科学引用本文复制引用
辛浩,赵海生,王俊江,葛淑灿..西北走廊地区电离层吸收特性研究[J].空间科学学报,2025,45(4):987-994,8.
