Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 9 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/20/2019   22:34:26   (   0.02,-137.21) (  -0.09,-137.58)   42.94                80
 09/21/2019   22:18:22   (   0.03,-137.21) (   0.94,-133.05)  473.44                80
 09/23/2019   10:40:10   (  -0.02,-137.20) (   0.20,-138.32)  127.60                80
 09/24/2019   10:18:45   (  -0.03,-137.19) (  -0.77,-133.78)  388.11                80
 09/25/2019   22:40:41   (   0.03,-137.18) (  -0.41,-139.09)  217.61                80
 09/26/2019   22:24:36   (   0.03,-137.17) (   0.62,-134.56)  297.88                80
 09/28/2019   10:46:24   (  -0.03,-137.15) (   0.58,-139.82)  304.01                80
 09/29/2019   10:24:59   (  -0.03,-137.14) (  -0.45,-135.29)  211.22                80
 09/30/2019   22:46:55   (   0.03,-137.12) (  -0.78,-140.58)  395.30                80
 10/01/2019   22:30:50   (   0.02,-137.10) (   0.25,-136.05)  119.74                80
 10/03/2019   10:52:37   (  -0.01,-137.08) (   0.95,-141.31)  482.84                80