Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 10 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/20/2019   10:31:09   (   0.02,-137.20) (  -0.10,-136.83)   43.18                80
 10/22/2019   22:34:19   (  -0.02,-137.20) (  -0.13,-137.59)   45.45                80
 10/23/2019   22:18:14   (  -0.02,-137.20) (   0.91,-133.07)  470.57                80
 10/25/2019   10:37:21   (   0.01,-137.19) (   0.28,-138.34)  131.36                80
 10/26/2019   10:18:37   (   0.01,-137.18) (  -0.77,-133.81)  384.46                80
 10/27/2019   22:40:32   (  -0.02,-137.17) (  -0.44,-139.11)  221.05                80
 10/28/2019   22:24:27   (  -0.02,-137.16) (   0.54,-134.58)  294.53                80
 10/30/2019   10:46:14   (   0.03,-137.15) (   0.64,-139.85)  308.01                80
 10/31/2019   10:24:50   (   0.03,-137.13) (  -0.40,-135.32)  206.97                80
 11/01/2019   22:46:45   (  -0.03,-137.11) (  -0.80,-140.62)  399.91                80
 11/02/2019   22:30:39   (  -0.03,-137.10) (   0.18,-136.08)  114.78                80