Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 7 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/09/2020   22:39:58   (  -0.02,-137.20) (  -0.41,-139.02)  207.77                80
 07/10/2020   22:23:53   (  -0.02,-137.20) (   0.57,-134.49)  308.73                80
 07/12/2020   10:45:42   (   0.03,-137.20) (   0.62,-139.75)  291.48                80
 07/13/2020   10:24:18   (   0.02,-137.20) (  -0.42,-135.23)  224.55                80
 07/14/2020   22:46:16   (  -0.02,-137.19) (  -0.76,-140.54)  381.18                80
 07/15/2020   22:30:12   (  -0.01,-137.19) (   0.28,-136.02)  134.33                80
 07/17/2020   10:52:00   (  -0.01,-137.18) (   0.91,-141.28)  467.57                80
 07/18/2020   10:30:36   (  -0.01,-137.17) (  -0.08,-136.75)   47.47                80
 07/20/2020   22:33:50   (   0.01,-137.13) (  -0.05,-137.53)   45.37                80
 07/21/2020   22:17:45   (   0.01,-137.12) (   0.94,-133.00)  469.26                80
 07/23/2020   10:39:34   (  -0.01,-137.09) (   0.26,-138.27)  133.83                80