Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 4 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/29/2019   22:33:48   (  -0.00,-137.19) (  -0.06,-137.56)   41.53                80
 04/30/2019   22:17:44   (  -0.00,-137.19) (   0.92,-133.03)  474.55                80
 05/02/2019   10:39:32   (   0.00,-137.20) (   0.27,-138.29)  125.66                80
 05/03/2019   10:18:09   (  -0.00,-137.19) (  -0.77,-133.77)  389.54                80
 05/04/2019   22:40:06   (   0.00,-137.16) (  -0.42,-139.08)  218.49                80
 05/05/2019   22:24:02   (   0.01,-137.15) (   0.57,-134.54)  296.52                80
 05/07/2019   10:45:51   (  -0.02,-137.15) (   0.57,-139.82)  304.91                80
 05/08/2019   10:24:26   (  -0.01,-137.13) (  -0.42,-135.29)  209.39                80
 05/09/2019   22:46:24   (   0.01,-137.08) (  -0.76,-140.60)  400.91                80
 05/10/2019   22:30:19   (   0.00,-137.06) (   0.23,-136.06)  113.26                80
 05/12/2019   10:52:08   (  -0.00,-137.05) (   0.98,-141.33)  488.58                80