KiwiSDR Recordings at WWVH, 23 June 2023

I had updated the KiwiSDR to v1.608 prior to recording. I placed it in the mode allowing three simultaneous down-converter/receivers at maximum bandwidth. I updated my Python script to record three WWVH frequencies, alternating on odd/even hours. I added the --ncomp, -H and -L flags as recommended, and recorded in the -m iq format with the -w flag for GNSS timestamps. Eg.: Even UTC hours: 2.5 MHz, 5 MHz, 10 MHz Odd UTC hours: 5 MHz, 10 MHz, 15 MHz I omit my recordings from prior days using a longer antenna... I'm sure it was overloaded and didn't use the larger bandwidth flags. I also omit all the recordings I tried from the hotel some ~20 miles away; my random wire antenna didn't amount to much.录制前，我已将KiwiSDR软件定义无线电接收机（KiwiSDR）升级至v1.608版本。我将其设置为可同时支持三台下变频器/接收机工作于最大带宽的模式。我更新了Python脚本（Python），使其可录制三个WWVH授时电台的频率，并在UTC奇、偶数小时交替切换录制频率。本次录制新增了推荐使用的--ncomp、-H及-L命令行参数，采用-m iq同相正交采样格式（In-phase/Quadrature）进行录制，并通过-w参数启用全球导航卫星系统（GNSS）时间戳功能。示例如下：UTC偶数小时录制2.5 MHz、5 MHz、10 MHz三个频率；UTC奇数小时录制5 MHz、10 MHz、15 MHz三个频率。我未收录此前使用更长天线录制的音频数据——我确信当时天线处于过载状态，且未启用大带宽相关参数。此外，我也未收录在约20英里外的酒店中尝试录制的所有数据，当时使用的随机拉线天线效果不甚理想。