Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 4 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/13/2020   10:30:34   (  -0.02,-137.20) (  -0.12,-136.82)   42.74                80
 04/15/2020   22:33:46   (   0.02,-137.18) (  -0.06,-137.60)   47.13                80
 04/16/2020   22:17:42   (   0.01,-137.17) (   0.96,-133.07)  468.49                80
 04/18/2020   10:39:29   (  -0.01,-137.15) (   0.23,-138.33)  133.67                80
 04/19/2020   10:18:04   (  -0.01,-137.14) (  -0.73,-133.79)  381.52                80
 04/20/2020   22:40:01   (   0.01,-137.12) (  -0.41,-139.10)  224.82                80
 04/21/2020   22:23:55   (   0.01,-137.11) (   0.56,-134.56)  290.25                80
 04/23/2020   10:45:44   (  -0.01,-137.09) (   0.58,-139.84)  312.62                80
 04/24/2020   10:24:18   (  -0.01,-137.07) (  -0.38,-135.29)  201.81                80
 04/25/2020   22:46:15   (   0.01,-137.04) (  -0.81,-140.60)  406.17                80