Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 4 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/15/2020   22:33:46   (   0.02,-137.18) (  -0.08,-137.59)   47.11                80
 04/16/2020   22:17:41   (   0.01,-137.17) (   0.94,-133.06)  468.39                80
 04/18/2020   10:39:29   (  -0.01,-137.15) (   0.26,-138.32)  133.99                80
 04/19/2020   10:18:04   (  -0.01,-137.14) (  -0.77,-133.80)  381.12                80
 04/20/2020   22:40:00   (   0.01,-137.12) (  -0.43,-139.10)  225.11                80
 04/21/2020   22:23:56   (   0.01,-137.11) (   0.59,-134.57)  289.88                80
 04/23/2020   10:45:43   (  -0.01,-137.08) (   0.61,-139.83)  313.23                80
 04/24/2020   10:24:19   (  -0.01,-137.06) (  -0.42,-135.30)  201.12                80
 04/25/2020   22:46:15   (   0.01,-137.03) (  -0.77,-140.60)  406.78                80
 04/26/2020   22:30:10   (   0.01,-137.01) (   0.19,-136.06)  107.25                80