Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 12 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/17/2019   10:45:50   (   0.01,-137.22) (   0.58,-139.82)  296.05                80
 12/18/2019   10:24:24   (   0.00,-137.22) (  -0.42,-135.29)  220.28                80
 12/19/2019   22:49:00   (  -0.01,-137.22) (  -0.78,-140.58)  384.45                80
 12/20/2019   22:27:34   (  -0.00,-137.21) (   0.23,-136.05)  131.83                80
 12/22/2019   10:52:01   (   0.01,-137.21) (   0.91,-141.33)  468.72                80
 12/23/2019   10:30:36   (   0.01,-137.20) (  -0.10,-136.79)   47.09                80
 12/25/2019   22:36:26   (  -0.02,-137.17) (  -0.09,-137.56)   43.33                80
 12/26/2019   22:15:00   (  -0.01,-137.16) (   0.91,-133.02)  471.97                80
 12/28/2019   10:39:27   (   0.02,-137.15) (   0.28,-138.28)  129.86                80
 12/29/2019   10:18:01   (   0.01,-137.13) (  -0.72,-133.75)  385.10                80