Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 12 7.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/08/2020   10:49:08   (  -0.01,-137.22) (   0.88,-141.28)  462.94                80
 12/09/2020   10:33:02   (  -0.01,-137.21) (  -0.14,-136.75)   53.45                80
 12/11/2020   22:33:31   (   0.00,-137.19) (  -0.09,-137.50)   36.00                80
 12/12/2020   22:17:26   (  -0.00,-137.19) (   0.92,-132.97)  479.91                80
 12/14/2020   10:36:32   (   0.00,-137.17) (   0.25,-138.24)  121.93                80
 12/15/2020   10:20:26   (   0.01,-137.15) (  -0.77,-133.70)  393.31                80
 12/16/2020   22:39:42   (  -0.01,-137.13) (  -0.41,-139.01)  213.62                80
 12/17/2020   22:23:36   (  -0.01,-137.11) (   0.61,-134.47)  301.44                80
 12/19/2020   10:45:22   (   0.01,-137.09) (   0.62,-139.73)  301.09                80
 12/20/2020   10:23:56   (   0.01,-137.07) (  -0.40,-135.19)  213.77                80