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

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/18/2019   10:31:15   (  -0.02,-137.21) (  -0.12,-136.82)   44.69                80
 09/20/2019   22:34:27   (   0.02,-137.21) (  -0.04,-137.59)   43.35                80
 09/21/2019   22:18:22   (   0.02,-137.20) (   0.93,-133.05)  472.96                80
 09/23/2019   10:40:10   (  -0.02,-137.20) (   0.21,-138.32)  127.78                80
 09/24/2019   10:18:46   (  -0.02,-137.19) (  -0.81,-133.79)  387.82                80
 09/25/2019   22:40:41   (   0.02,-137.17) (  -0.42,-139.08)  218.49                80
 09/26/2019   22:24:36   (   0.02,-137.16) (   0.61,-134.55)  296.90                80
 09/28/2019   10:46:24   (  -0.02,-137.15) (   0.60,-139.81)  304.75                80
 09/29/2019   10:24:59   (  -0.02,-137.13) (  -0.43,-135.29)  210.42                80
 09/30/2019   22:46:55   (   0.03,-137.11) (  -0.74,-140.59)  396.71                80