Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 9 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/02/2019   10:31:16   (  -0.03,-137.20) (  -0.13,-136.84)   41.97                80
 09/04/2019   22:34:28   (   0.03,-137.20) (  -0.04,-137.61)   46.92                80
 09/05/2019   22:18:23   (   0.03,-137.19) (   0.98,-133.08)  469.14                80
 09/07/2019   10:40:10   (  -0.03,-137.19) (   0.22,-138.34)  131.87                80
 09/08/2019   10:18:46   (  -0.04,-137.18) (  -0.80,-133.81)  383.74                80
 09/09/2019   22:40:42   (   0.04,-137.16) (  -0.39,-139.12)  222.40                80
 09/10/2019   22:24:38   (   0.04,-137.15) (   0.63,-134.59)  293.05                80
 09/12/2019   10:46:25   (  -0.04,-137.14) (   0.58,-139.85)  308.66                80
 09/13/2019   10:25:01   (  -0.04,-137.13) (  -0.45,-135.32)  206.57                80
 09/14/2019   22:46:57   (   0.04,-137.11) (  -0.73,-140.62)  400.17                80