Voyager-1 recording with Allen Telescope Array on 2020-11-14: scan 1/4

This dataset contains a recording of X-band telemetry signals from Voyager-1 recorded with Allen Telescope Array on 2020-11-14. Antennas 1a and 4g from the array were used in dual XY (linear) polarization. The hardware configuration was as follows: both antennas were connected to RFCB LO d, which was tuned to a frequency of 8419.7 MHz and used an output IF of 512 MHz. A USRP N321 and a USRP N320 were connected to the IF output of the RFCB. The N321 digitized both polarizations from antenna 1a, while the N320 digitized both polarizations of antenna 4g. The USRPs were synchronized by using external 10 MHz reference and PPS coming from the observatory distribution system. The LO from the N321 was shared to all the channels involved in the recording. The IQ sample rate of the USRPs was 960 ksps. A GNU Radio flowgraph was used to record the 16 bit IQ signals to disk using the GNU Radio metatata file format, with detached headers. After recording, the data was converted to SigMF format by adding the suitable metadata. The observation was organized in four scans of 30 minutes each, with gaps of 5 minutes between them where a phase calibrator was observed. This dataset contains the scan 1/4.本数据集包含2020年11月14日利用艾伦望远镜阵列（Allen Telescope Array）捕获的旅行者1号（Voyager-1）X波段遥测信号记录。本次采集使用该阵列的1a号与4g号天线，采用双XY（线性）极化模式。硬件配置如下：两天线均连接至RFCB本振d（RFCB LO d），该本振调谐至8419.7 MHz，输出中频为512 MHz。两台通用软件无线电外设（USRP）N321与USRP N320分别接入该RFCB的中频输出端口：USRP N321对1a号天线的两路极化信号进行数字化，USRP N320则完成4g号天线两路极化信号的数字化。两台USRP通过接收来自天文台分发系统的外部10 MHz参考时钟信号与PPS（秒脉冲）信号实现同步，本次采集所用本振信号由USRP N321引出，为所有参与采集的通道提供本振源。两台USRP的IQ采样率为960 ksps。采集过程采用GNU Radio流图，以GNU Radio元数据文件格式将16位IQ信号写入磁盘，且采用分离式头文件存储。采集完成后，通过添加适配的元数据将数据转换为SigMF格式。本次观测分为四次扫描，每次扫描时长30分钟，扫描间隔5分钟，间隔时段用于观测相位校准源。本数据集为四次扫描中的第1次扫描数据。