Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 6 16.  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) (  -0.08,-137.62)   50.05                80
 06/17/2019   22:18:07   (   0.01,-137.18) (   0.92,-133.09)  465.81                80
 06/19/2019   10:39:55   (  -0.01,-137.19) (   0.26,-138.36)  133.49                80
 06/20/2019   10:18:31   (  -0.00,-137.18) (  -0.74,-133.83)  381.91                80
 06/21/2019   22:40:28   (   0.00,-137.14) (  -0.42,-139.14)  227.04                80
 06/22/2019   22:24:24   (  -0.01,-137.13) (   0.58,-134.60)  288.40                80
 06/24/2019   10:46:12   (   0.00,-137.14) (   0.60,-139.87)  311.29                80
 06/25/2019   10:24:48   (   0.01,-137.12) (  -0.40,-135.34)  203.61                80
 06/26/2019   22:46:44   (  -0.00,-137.07) (  -0.81,-140.64)  406.75                80
 06/27/2019   22:30:40   (  -0.01,-137.06) (   0.19,-136.11)  107.89                80
 06/29/2019   10:49:48   (  -0.00,-137.06) (   0.99,-141.37)  492.82                80