Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 6 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/16/2019   22:34:12   (   0.01,-137.18) (  -0.09,-137.62)   49.79                80
 06/17/2019   22:18:07   (   0.01,-137.18) (   0.91,-133.09)  466.10                80
 06/19/2019   10:39:55   (  -0.00,-137.19) (   0.27,-138.36)  132.98                80
 06/20/2019   10:18:31   (   0.00,-137.18) (  -0.73,-133.82)  382.46                80
 06/21/2019   22:40:28   (  -0.00,-137.14) (  -0.43,-139.13)  226.62                80
 06/22/2019   22:24:24   (  -0.01,-137.13) (   0.57,-134.60)  288.85                80
 06/24/2019   10:46:12   (   0.01,-137.14) (   0.61,-139.87)  310.58                80
 06/25/2019   10:24:48   (   0.01,-137.13) (  -0.39,-135.34)  204.35                80
 06/26/2019   22:46:44   (  -0.01,-137.08) (  -0.82,-140.64)  406.16                80
 06/27/2019   22:30:39   (  -0.01,-137.06) (   0.18,-136.10)  108.56                80