Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 12 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/17/2020   22:23:45   (   0.00,-137.23) (   0.63,-134.51)  309.71                80
 12/19/2020   10:42:53   (  -0.01,-137.23) (   0.58,-139.78)  290.92                80
 12/20/2020   10:26:48   (  -0.01,-137.23) (  -0.42,-135.25)  225.08                80
 12/21/2020   22:46:05   (   0.01,-137.22) (  -0.74,-140.56)  381.08                80
 12/22/2020   22:30:01   (   0.01,-137.21) (   0.27,-136.03)  134.76                80
 12/24/2020   10:49:09   (  -0.01,-137.21) (   0.89,-141.30)  466.35                80
 12/25/2020   10:33:05   (  -0.00,-137.20) (  -0.12,-136.77)   49.21                80
 12/27/2020   22:33:37   (  -0.01,-137.17) (  -0.08,-137.54)   42.92                80
 12/28/2020   22:17:32   (  -0.01,-137.15) (   0.93,-133.01)  471.82                80
 12/30/2020   10:36:39   (   0.01,-137.13) (   0.29,-138.28)  131.22                80