Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 6 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/25/2019   10:24:48   (  -0.00,-137.21) (  -0.43,-135.35)  212.46                80
 06/26/2019   22:46:44   (   0.00,-137.19) (  -0.78,-140.64)  394.00                80
 06/27/2019   22:30:40   (   0.00,-137.19) (   0.22,-136.11)  122.24                80
 06/29/2019   10:52:28   (  -0.01,-137.20) (   0.96,-141.38)  477.15                80
 06/30/2019   10:31:05   (  -0.01,-137.19) (  -0.11,-136.86)   38.38                80
 07/02/2019   22:34:17   (   0.01,-137.15) (  -0.10,-137.63)   55.07                80
 07/03/2019   22:18:12   (   0.01,-137.13) (   0.90,-133.09)  459.92                80
 07/05/2019   10:40:00   (  -0.01,-137.13) (   0.27,-138.36)  141.02                80
 07/06/2019   10:18:36   (   0.00,-137.11) (  -0.73,-133.83)  373.54                80
 07/07/2019   22:40:32   (  -0.00,-137.06) (  -0.48,-139.13)  236.36                80
 07/08/2019   22:24:28   (  -0.01,-137.04) (   0.53,-134.60)  278.14                80