2.7.0 spase://HamSCI/DisplayData/HFRadars/AmateurRadioSignalReport/AmateurRadioSignalReport HamSCI DisplayData Amateur Radio Signal Report HamSCI Spot Density Plots 2025-04-02T15:29:35 The HamSCI display data consists of daily radio spot density plots visualizing amateur radio spots across six frequency bands (1.8 MHz, 3.5 MHz, 7 MHz, 14 MHz, 21 MHz, and 28 MHz). Each spot represents the midpoint between a successful transmitting-receiving pair. The plots are organized into two columns: Left Column displays the global distribution of radio spots on a map, with the number of spots represented in log scale as color intensity. Right Column displays the number of radio spots as a function of the midpoint solar local time (hour) and propagation range (km), also presented in log scale. These plots provide insights into the spatial and temporal variations of radio propagation. Please acknowledge HamSCI team at The University of Scranton and The University of Alabama that collects amateur radio signal report from volunteers via three up-stream data providers including WSPRNet, PSKReporter, and Reverse Beacon Network. The data are available to public at MIT Madrigal database. This effort is supported by NASA grant number 80NSSC21K1772. NASA Enabling Space Weather Research with Global Scale Amateur Radio Datasets NASA 80NSSC21K1772 spase://SMWG/Person/Nathaniel.Frissell PrincipalInvestigator spase://SMWG/Person/William.Engelke TechnicalContact spase://SMWG/Person/Kornyanat.Hozumi MetadataContact spase://HamSCI/Repository/Madrigal Online Open https://cedar.openmadrigal.org/listExperiments?isGlobal=on&categories=4&instruments=8308&showDefault=on&start_date_0=1950-01-01&start_date_1=00%3A00%3A00&end_date_0=2025-12-31&end_date_1=23%3A59%3A59 Daily HamSCI Spot Density Plots in jpg format JPEG The plot file follows the naming pattern "$Y-$m-$d.jpg", where $Y is the year, $m is the month, and $d is the day. Waves 2009-02-24T00:00:00 -P1M Data are current to within about a month. Cadence is irregular.