Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 6 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)
 06/27/2019   22:30:40   (   0.00,-137.19) (   0.24,-136.11)  122.62                80
 06/29/2019   10:52:29   (  -0.01,-137.20) (   0.94,-141.38)  477.03                80
 06/30/2019   10:31:04   (  -0.02,-137.19) (  -0.07,-136.85)   38.55                80
 07/02/2019   22:34:17   (   0.02,-137.15) (  -0.08,-137.63)   54.51                80
 07/03/2019   22:18:12   (   0.01,-137.14) (   0.92,-133.10)  460.54                80
 07/05/2019   10:40:01   (  -0.01,-137.13) (   0.25,-138.37)  140.50                80
 07/06/2019   10:18:36   (   0.00,-137.11) (  -0.76,-133.84)  374.18                80
 07/07/2019   22:40:33   (  -0.00,-137.07) (  -0.46,-139.13)  235.32                80
 07/08/2019   22:24:28   (  -0.01,-137.05) (   0.55,-134.60)  279.22                80
 07/10/2019   10:43:36   (   0.01,-137.04) (   0.62,-139.87)  322.44                80