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)
 06/11/2019   22:30:35   (  -0.01,-137.18) (   0.25,-136.11)  123.10                80
 06/13/2019   10:52:23   (  -0.00,-137.20) (   0.94,-141.37)  475.40                80
 06/14/2019   10:30:59   (  -0.00,-137.20) (  -0.06,-136.84)   40.20                80
 06/16/2019   22:34:11   (   0.01,-137.15) (  -0.09,-137.62)   53.51                80
 06/17/2019   22:18:07   (   0.01,-137.14) (   0.91,-133.09)  461.86                80
 06/19/2019   10:39:55   (  -0.01,-137.15) (   0.28,-138.36)  137.65                80
 06/20/2019   10:18:31   (   0.00,-137.14) (  -0.72,-133.82)  377.32                80
 06/21/2019   22:40:28   (   0.00,-137.09) (  -0.43,-139.13)  232.89                80
 06/22/2019   22:24:24   (  -0.00,-137.07) (   0.57,-134.60)  282.07                80
 06/24/2019   10:43:32   (   0.00,-137.08) (   0.61,-139.87)  317.87                80