Comparison of real-time ACE solar wind speed data (solid black line) with Wang-Sheeley-Arge model predictions (colored dots). The three sets of predictions (i.e., red, green, and blue dots) are based on data from, respectively, Wilcox (WSO), Mount Wilson (MWO) and SOLIS (NSO) solar observatories. The vertical bars associated with the colored dots are uncertainty estimates of the solar wind speed predictions, which are determined by calculating the predicted solar wind speeds for the expansion factors located 2.5 degrees above and below the sub-earth point.
Plots updated daily as new data becomes available.
Return to Wang-Sheeley-Arge Main Page