Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 6 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)
 06/14/2019   10:31:00   (  -0.02,-137.22) (  -0.13,-136.86)   41.80                80
 06/16/2019   22:34:11   (   0.02,-137.19) (  -0.09,-137.62)   49.72                80
 06/17/2019   22:18:08   (   0.03,-137.19) (   0.97,-133.10)  466.38                80
 06/19/2019   10:39:56   (  -0.03,-137.21) (   0.22,-138.37)  132.31                80
 06/20/2019   10:18:32   (  -0.03,-137.20) (  -0.78,-133.84)  383.26                80
 06/21/2019   22:40:28   (   0.04,-137.16) (  -0.43,-139.13)  225.57                80
 06/22/2019   22:24:25   (   0.03,-137.15) (   0.63,-134.61)  290.08                80
 06/24/2019   10:46:13   (  -0.04,-137.17) (   0.56,-139.88)  308.90                80
 06/25/2019   10:24:49   (  -0.04,-137.16) (  -0.45,-135.35)  206.22                80
 06/26/2019   22:46:45   (   0.04,-137.11) (  -0.77,-140.65)  403.93                80