Annular Solar Eclipse 2023: recordings of the entire medium-wave AM broadcast band from Phoenix, AZ, USA, Part 2

recorded by Burke Baumann, KF7NP

Grid square of location recorded:   DM33wp

Maximum obscuration of the sun was 79% at 1632UT on 14 October 2023.

These data files are recordings of the entire medium wave broadcast band (535-1705kHz) made during the annular solar eclipse of 14 October 2024 from 1501UT to 1755UT at Phoenix, AZ, USA.  They are part of a set of such recordings made from 1304 to 2200UT on 14 October and from 1300 to 2200UT on 15 October, 2023.

Data Quality:   Some broadband local electrical noise was present, plus some spurious carriers, but did not affect overall quality.

Data files are .wav format, but the archived files are .zip, with four or five .wav files packaged together in each .zip file, using the prefix "KF7NP-wideband_160_2080kHz".  As the total files recorded during the solar eclipse exceeded the Zenodo 50GB limit, the remainder of the dataset is found in "Annular Solar Eclipse 2023: recordings of the entire medium-wave AM broadcast band from Phoenix, AZ, USA, Part 1”

The recordings not included here or in Part 1 are available to provide reference data for the eclipse recordings.  Please contact HamSCI at [e-mail] if you require this data. 

Antenna:  Hustler 20m mobile vertical with an inline choke balun in the feed line   

Receiver:  Receiver used:    ICOM IC-7610 SDR transceiver (16-bit data), 0dB front end gain / attenuation.  (Baumann: I also believe the IC-7610 has a low pass filter with a cutoff at 1.6 MHz so signals above this may be attenuated.)  Center frequency was 1100kHz, recording a 1920kHz wide passband using HDSDR software.   The receiver was locked to a 10 MHz signal from a homebrew GPSDO reference, which was always accurate to better than  0.1 ppb.   Computer time accuracy was determined by Dimension 4 NTP.

由呼号为KF7NP的伯克·鲍曼（Burke Baumann）录制。
记录地点的网格定位符：DM33wp
2023年10月14日16时32分世界时（UT），太阳最大食分达79%。
本数据集包含2024年10月14日日环食期间，于美国亚利桑那州凤凰城，从世界时1501时至1755时录制的全中波广播频段（535-1705kHz）信号。该组录制数据为2023年10月14日1304时至2200时、以及2023年10月15日1300时至2200时录制的同类型数据集的一部分。
数据质量：存在部分宽带本地工频噪声与杂散载波，但未对整体数据质量造成影响。
数据文件格式为.wav，归档文件采用.zip格式，每个压缩包内包含4至5个.wav文件，文件前缀统一为"KF7NP-wideband_160_2080kHz"。由于本次日食期间录制的总数据量超过Zenodo平台50GB的单文件限制，本数据集的剩余部分可在《2023年日环食：美国亚利桑那州凤凰城全中波调幅广播频段录制数据集 第一部分》中获取。
未包含于本数据集及第一部分的录制数据可作为本次日食录制的参考数据使用。若需获取此类数据，请发送邮件至[e-mail]联系HamSCI团队。
天线：采用Hustler 20m移动式垂直天线，馈线内置扼流巴伦（balun）。
接收机：使用的接收机为ICOM IC-7610软件定义无线电（SDR）收发机，采用16位数据格式，前端增益/衰减设置为0dB。（鲍曼补充：据其推测，IC-7610内置截止频率为1.6MHz的低通滤波器，因此高于该频率的信号可能会被衰减。）录制时中心频率设为1100kHz，通过HDSDR软件录制1920kHz带宽的通带信号。接收机通过自制GPS同步振荡器（GPSDO）输出的10MHz参考信号进行锁相，时钟精度始终优于0.1ppb。计算机时间精度通过Dimension 4网络时间协议（NTP）校准。