Frequency Window of NVIS Channel from Kupang Ionosonde Year 2022

This dataset was obtained from the ionogram at Kupang in 2022 to investigate the frequency window of the Near Vertical Incidence Skywave (NVIS) channel with homogenous Time of Flight (ToF) values. All data is in the form of.mat files (MATLAB). The first dataset is in Matlab variables ('DataWidthFrekHourly','DataCenterWidthFrekHourly'), which consist of maximum window frequency values with homogenous ToF and the center frequency of the widest window. The structure of the data array is 96x365, with the row as the time (1:96) and the column as the day in one year (1:365). The second dataset is compressed data in the form of a Matlab variables file ('nil_widthf','nilToFnya') with information on the widest frequency window hourly every day in 2022 and its ToF values. 

该数据集来源于2022年古邦（Kupang）的电离图，旨在研究具有均匀飞行时间（Time of Flight，ToF）值的近垂直入射天波（Near Vertical Incidence Skywave，NVIS）信道的频率窗口。所有数据均以.mat文件（MATLAB格式）存储。第一部分数据集包含两个Matlab变量（'DataWidthFrekHourly'、'DataCenterWidthFrekHourly'），分别存储具有均匀ToF的最大窗口频率值以及最宽窗口的中心频率。数据数组结构为96×365，其中行代表时间（1至96），列代表一年中的天数（1至365）。第二部分数据集为压缩数据，以Matlab变量文件形式存储（包含变量'nil_widthf'、'nilToFnya'），记录了2022年每日每小时的最宽频率窗口及其ToF值信息。