Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 4 27.  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) (  -0.08,-137.56)   41.56                80
 04/30/2019   22:17:44   (  -0.00,-137.19) (   0.90,-133.02)  474.49                80
 05/02/2019   10:39:33   (   0.00,-137.20) (   0.24,-138.30)  125.69                80
 05/03/2019   10:18:08   (   0.00,-137.19) (  -0.75,-133.77)  389.55                80
 05/04/2019   22:40:06   (  -0.00,-137.16) (  -0.44,-139.07)  218.46                80
 05/05/2019   22:24:02   (   0.00,-137.15) (   0.61,-134.55)  296.68                80
 05/07/2019   10:45:51   (  -0.00,-137.15) (   0.59,-139.82)  304.44                80
 05/08/2019   10:24:26   (  -0.01,-137.13) (  -0.39,-135.28)  209.57                80
 05/09/2019   22:46:23   (   0.01,-137.08) (  -0.78,-140.59)  401.13                80
 05/10/2019   22:30:20   (   0.02,-137.06) (   0.26,-136.07)  112.85                80