This visualization shows how hourly measurements for a telescope named Lesedi vary over several days in March 2015, using a colored line chart with four distinct lines. It loads data from a CSV file and renders it as an SVG using D3 v5, with a time-scaled x-axis and a linear y-axis. The chart employs `d3.nest` to group data by telescope, `d3.line` with `curveBasis` to smooth each series, and `d3.scaleOrdinal` with `schemeCategory10` to assign stroke colors to each line.