Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 12 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/06/2020   22:30:01   (   0.00,-137.21) (   0.29,-136.02)  136.95                80
 12/08/2020   10:49:08   (  -0.01,-137.21) (   0.88,-141.28)  463.67                80
 12/09/2020   10:33:02   (  -0.01,-137.20) (  -0.13,-136.75)   52.41                80
 12/11/2020   22:33:31   (   0.00,-137.18) (  -0.10,-137.50)   38.07                80
 12/12/2020   22:17:25   (  -0.00,-137.16) (   0.92,-132.97)  477.55                80
 12/14/2020   10:36:32   (   0.00,-137.15) (   0.26,-138.24)  124.45                80
 12/15/2020   10:20:26   (   0.01,-137.13) (  -0.76,-133.70)  390.50                80
 12/16/2020   22:39:42   (  -0.01,-137.10) (  -0.41,-139.01)  217.18                80
 12/17/2020   22:23:36   (  -0.01,-137.08) (   0.60,-134.47)  297.58                80
 12/19/2020   10:45:21   (   0.01,-137.05) (   0.63,-139.73)  305.11                80