Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 5 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/10/2020   10:24:18   (  -0.02,-137.20) (  -0.42,-135.29)  217.16                80
 05/11/2020   22:46:14   (   0.01,-137.21) (  -0.76,-140.59)  386.05                80
 05/12/2020   22:30:09   (   0.01,-137.21) (   0.27,-136.06)  131.02                80
 05/14/2020   10:51:57   (  -0.01,-137.22) (   0.92,-141.33)  468.52                80
 05/15/2020   10:30:32   (  -0.01,-137.22) (  -0.11,-136.80)   48.25                80
 05/17/2020   22:33:43   (   0.00,-137.22) (  -0.09,-137.56)   39.07                80
 05/18/2020   22:17:39   (   0.01,-137.22) (   0.94,-133.03)  477.55                80
 05/20/2020   10:39:26   (  -0.00,-137.22) (   0.25,-138.30)  122.94                80
 05/21/2020   10:18:01   (  -0.00,-137.22) (  -0.78,-133.77)  393.08                80
 05/22/2020   22:39:58   (   0.00,-137.20) (  -0.39,-139.07)  212.40                80
 05/23/2020   22:23:52   (   0.00,-137.20) (   0.59,-134.53)  303.27                80