Impact of an ICME in November 2003 on the GRACE-A satellite (normalized to 490 km). The top panel shows the neutral density evolution, middle panel the resulting orbit decay (OD), and bottom panel the OD rate (black lines). Additionally illustrated are the calculated background density (orange line), the disturbance time (red line), and the ICME plasma/field start and end times (blue line) taken from the R&C catalog and the start and end times of the orbit decay (green lines).