Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 6 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/13/2019   10:52:23   (  -0.01,-137.21) (   0.93,-141.38)  475.10                80
 06/14/2019   10:30:59   (  -0.01,-137.21) (  -0.07,-136.84)   40.83                80
 06/16/2019   22:34:12   (   0.02,-137.17) (  -0.09,-137.62)   51.70                80
 06/17/2019   22:18:07   (   0.02,-137.16) (   0.91,-133.09)  463.93                80
 06/19/2019   10:39:56   (  -0.03,-137.18) (   0.21,-138.37)  135.40                80
 06/20/2019   10:18:32   (  -0.03,-137.17) (  -0.79,-133.84)  379.76                80
 06/21/2019   22:40:28   (   0.03,-137.12) (  -0.43,-139.14)  229.69                80
 06/22/2019   22:24:24   (   0.03,-137.11) (   0.58,-134.60)  285.53                80
 06/24/2019   10:46:12   (  -0.04,-137.12) (   0.61,-139.87)  314.08                80
 06/25/2019   10:24:49   (  -0.03,-137.11) (  -0.45,-135.35)  200.65                80