Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 12 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/19/2020   10:42:53   (  -0.01,-137.23) (   0.54,-139.79)  290.84                80
 12/20/2020   10:26:49   (  -0.01,-137.23) (  -0.47,-135.25)  225.12                80
 12/21/2020   22:46:05   (   0.02,-137.22) (  -0.76,-140.55)  381.08                80
 12/22/2020   22:30:01   (   0.01,-137.21) (   0.25,-136.02)  134.78                80
 12/24/2020   10:49:09   (  -0.01,-137.21) (   0.90,-141.30)  466.30                80
 12/25/2020   10:33:05   (  -0.01,-137.20) (  -0.11,-136.77)   49.19                80
 12/27/2020   22:33:36   (  -0.01,-137.17) (  -0.10,-137.54)   42.90                80
 12/28/2020   22:17:32   (  -0.01,-137.15) (   0.91,-133.01)  471.85                80
 12/30/2020   10:36:40   (   0.01,-137.13) (   0.24,-138.29)  131.13                80
 12/31/2020   10:20:36   (   0.01,-137.11) (  -0.77,-133.76)  383.03                80
 01/01/2021   22:39:52   (  -0.00,-137.07) (  -0.44,-139.06)  226.01                80