Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 5 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)
 05/14/2020   10:51:57   (  -0.01,-137.19) (   0.93,-141.32)  471.23                80
 05/15/2020   10:30:32   (  -0.01,-137.19) (  -0.10,-136.79)   44.84                80
 05/17/2020   22:33:43   (   0.01,-137.18) (  -0.10,-137.56)   43.74                80
 05/18/2020   22:17:38   (   0.01,-137.17) (   0.93,-133.03)  472.19                80
 05/20/2020   10:39:26   (  -0.01,-137.16) (   0.26,-138.29)  129.78                80
 05/21/2020   10:18:01   (  -0.01,-137.15) (  -0.77,-133.77)  385.53                80
 05/22/2020   22:39:57   (   0.01,-137.13) (  -0.45,-139.06)  220.51                80
 05/23/2020   22:23:52   (   0.01,-137.11) (   0.58,-134.53)  294.43                80
 05/25/2020   10:45:39   (  -0.00,-137.08) (   0.61,-139.79)  309.00                80
 05/26/2020   10:24:15   (   0.00,-137.06) (  -0.43,-135.27)  205.35                80