A scatter plot displays the relationship between observation timestamps and Global Horizontal Irradiance (GHI) values from a CSV dataset. Time is plotted on the x-axis and solar radiation on the y-axis, with each data point rendered as a small circle. The visualization uses D3.v7 APIs including `d3.csv`, `d3.scaleTime`, and `d3.scaleLinear` to parse data and map coordinates, while `d3.axisLeft` and `d3.axisBottom` generate the chart axes. The SVG output is sized to fill the browser window.