Replication Data for: Estimating polar cap density and medium frequency burst source heights using 2fce roar radio emissions

Attached are partially processed data used to determine directions of arrival of auroral radio emissions. Voltages from antennas (labeled 1-2-3) have been cross-spectrally analyzed, yielding phase differences between the antennas on each frequency in the spectrum. From these, elevations and azimuths of arrival have been derived for each frequency. Consecutive spectra are recorded in the attached files; format is below. The format of the ascii files is: first six lines give the date and time of the first spectrum YY MM DD HH MM SS The subsequent pattern, repeated over and over, is: 1-line: seconds since previous spectrum (typically 4-5 seconds) 115 times eight lines corresponding to 115 evenly spaced frequencies within the range determined according to instructions below, going from lowest to highest. The eight lines for each frequency are: coherence (a number 0-100 corresponding to 0-1) azimuth in degrees (angle off north encoded as (azimuth+180)/1.5 ) elevation in degrees relative power (in tenths of dB) MSB for the phase difference between antennas 1 and 2 LSB for the phase difference between antennas 1 and 2 (in degrees, encoded as (phasediff+180)/1.5 ) MSB for the phase difference between antennas 1 and 3 LSB for the phase difference between antennas 1 and 3 (in degrees, encoded as (phasediff+180)/1.5 ) To determine the frequency of each of the above data. First, the frequency range is encoded in the filename: -1.asc at the end means 100-850 kHz, -2.asc at the end means 850-1600 kHz, -3.asc at the end means 1600-2450 kHz, -4.asc at the end means 2450-3100 kHz, within each range, there are 115 evenly spaced frequencies.附件中为部分预处理后的数据，用于确定极光射电辐射的到达方向。已对编号为1-2-3的天线采集到的电压信号进行互频谱分析，得到频谱中各频率下天线间的相位差。基于上述相位差，可推导得到各频率下辐射的到达仰角与方位角。附件文件中存储了连续采集的频谱数据，其格式说明如下。 ASCII格式文件的格式规则如下：前六行用于记录第一条频谱的日期与时间，格式为YY MM DD HH MM SS。后续为重复循环的固定格式块，每个格式块的第一行记录当前频谱与前一条频谱的时间间隔（单位：秒，通常为4~5秒）。接下来是115组（每组8行）数据，分别对应以下说明中指定频段内从低到高均匀分布的115个频率点。 每个频率点对应的8行数据依次为：1. 相干系数（取值范围0~100，对应实际值0~1）；2. 方位角（单位：度，以北向为基准的角度编码方式为(azimuth+180)/1.5）；3. 仰角（单位：度）；4. 相对功率（以0.1dB为单位，即取值为实际dB数的10倍）；5. 天线1与2之间相位差的最高有效字节（Most Significant Byte，MSB）；6. 天线1与2之间相位差的最低有效字节（Least Significant Byte，LSB），相位差单位为度，编码方式为(phasediff+180)/1.5；7. 天线1与3之间相位差的最高有效字节（Most Significant Byte，MSB）；8. 天线1与3之间相位差的最低有效字节（Least Significant Byte，LSB），相位差单位为度，编码方式为(phasediff+180)/1.5。 若需确定上述各数据对应的频率，可通过文件名进行判断：文件名以-1.asc结尾时，对应频段为100~850 kHz；文件名以-2.asc结尾时，对应频段为850~1600 kHz；文件名以-3.asc结尾时，对应频段为1600~2450 kHz；文件名以-4.asc结尾时，对应频段为2450~3100 kHz；每个频段内均包含115个均匀分布的频率点。