The panels show the performance of the CPOS service, in the form of the number of stations that are unable to compute a solution for a percentage of the observed satellites. The percentage is 70% for the blue line and 10% for the red line. The top panel covers Northern Norway (67–72° N), the middle panel covers middle Norway (62–67° N) and the bottom panel covers Southern Norway (57–62° N). The panels are scaled to the number of stations within each of regions, meaning that if the line reaches the top of a panel, 100% of the stations in that region are affected. The vertical black line in the middle indicates midnight.