Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 7 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/14/2020   22:48:56   (  -0.03,-137.19) (  -0.75,-140.54)  380.71                80
 07/15/2020   22:27:31   (  -0.02,-137.19) (   0.24,-136.01)  134.73                80
 07/17/2020   10:52:00   (   0.02,-137.17) (   0.96,-141.27)  467.90                80
 07/18/2020   10:30:36   (   0.01,-137.16) (  -0.09,-136.75)   46.80                80
 07/20/2020   22:33:50   (   0.02,-137.13) (  -0.05,-137.54)   46.13                80
 07/21/2020   22:17:45   (   0.02,-137.11) (   0.94,-133.00)  468.27                80
 07/23/2020   10:36:54   (  -0.02,-137.08) (   0.25,-138.27)  135.77                80
 07/24/2020   10:20:49   (  -0.01,-137.06) (  -0.74,-133.73)  378.34                80
 07/25/2020   22:40:07   (   0.01,-137.03) (  -0.45,-139.04)  229.64                80
 07/26/2020   22:24:02   (   0.01,-137.00) (   0.55,-134.51)  284.16                80
 07/28/2020   10:43:10   (  -0.01,-136.96) (   0.65,-139.77)  320.95                80