Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 7 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/15/2020   22:27:31   (  -0.03,-137.19) (   0.21,-136.00)  134.90                80
 07/17/2020   10:52:00   (   0.02,-137.17) (   0.92,-141.28)  467.68                80
 07/18/2020   10:30:36   (   0.01,-137.16) (  -0.07,-136.75)   47.10                80
 07/20/2020   22:33:50   (   0.02,-137.13) (  -0.07,-137.53)   45.83                80
 07/21/2020   22:17:45   (   0.02,-137.11) (   0.92,-132.99)  468.46                80
 07/23/2020   10:36:53   (  -0.02,-137.08) (   0.27,-138.26)  135.53                80
 07/24/2020   10:20:50   (  -0.01,-137.06) (  -0.78,-133.74)  378.74                80
 07/25/2020   22:40:06   (   0.00,-137.03) (  -0.47,-139.03)  229.02                80
 07/26/2020   22:24:03   (  -0.00,-137.01) (   0.58,-134.51)  284.90                80
 07/28/2020   10:43:11   (  -0.01,-136.97) (   0.61,-139.78)  320.53                80
 07/29/2020   10:27:07   (  -0.01,-136.94) (  -0.39,-135.25)  192.84                80