Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 9 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)
 09/14/2019   22:46:56   (   0.02,-137.18) (  -0.77,-140.61)  391.37                80
 09/15/2019   22:30:52   (   0.02,-137.19) (   0.25,-136.08)  125.99                80
 09/17/2019   10:52:40   (  -0.02,-137.20) (   0.89,-141.35)  472.36                80
 09/18/2019   10:31:16   (  -0.02,-137.21) (  -0.13,-136.82)   44.49                80
 09/20/2019   22:37:06   (   0.02,-137.19) (  -0.08,-137.58)   44.54                80
 09/21/2019   22:18:22   (   0.02,-137.19) (   0.95,-133.05)  471.53                80
 09/23/2019   10:40:09   (  -0.02,-137.19) (   0.26,-138.31)  128.83                80
 09/24/2019   10:18:45   (  -0.02,-137.18) (  -0.77,-133.78)  386.60                80
 09/25/2019   22:40:41   (   0.02,-137.15) (  -0.40,-139.09)  220.62                80
 09/26/2019   22:24:37   (   0.02,-137.14) (   0.63,-134.56)  294.62                80
 09/28/2019   10:43:44   (  -0.02,-137.13) (   0.58,-139.82)  306.62                80