Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 3 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/14/2020   22:33:42   (  -0.01,-137.21) (  -0.07,-137.58)   41.71                80
 03/15/2020   22:17:38   (  -0.01,-137.21) (   0.94,-133.05)  474.75                80
 03/17/2020   10:39:25   (   0.02,-137.21) (   0.28,-138.31)  125.96                80
 03/18/2020   10:18:01   (   0.02,-137.21) (  -0.73,-133.78)  389.88                80
 03/19/2020   22:39:58   (  -0.01,-137.20) (  -0.42,-139.09)  215.94                80
 03/20/2020   22:23:53   (  -0.01,-137.19) (   0.59,-134.56)  299.88                80
 03/22/2020   10:45:41   (   0.01,-137.19) (   0.63,-139.82)  301.17                80
 03/23/2020   10:24:16   (   0.01,-137.18) (  -0.39,-135.29)  214.28                80
 03/24/2020   22:46:14   (  -0.00,-137.16) (  -0.76,-140.61)  392.49                80
 03/25/2020   22:30:09   (  -0.00,-137.15) (   0.25,-136.08)  122.88                80
 03/27/2020   10:51:56   (   0.00,-137.14) (   0.96,-141.34)  478.66                80