Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 12 3.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/03/2019   22:49:09   (  -0.01,-137.20) (  -0.80,-140.60)  388.99                80
 12/04/2019   22:27:45   (  -0.00,-137.20) (   0.26,-136.08)  127.51                80
 12/06/2019   10:52:11   (   0.01,-137.20) (   0.94,-141.34)  472.00                80
 12/07/2019   10:30:46   (   0.00,-137.20) (  -0.06,-136.81)   44.29                80
 12/09/2019   22:36:37   (  -0.01,-137.18) (  -0.09,-137.58)   45.77                80
 12/10/2019   22:15:11   (  -0.01,-137.17) (   0.91,-133.05)  469.79                80
 12/12/2019   10:39:37   (   0.02,-137.16) (   0.29,-138.31)  131.43                80
 12/13/2019   10:18:12   (   0.01,-137.14) (  -0.72,-133.78)  383.46                80
 12/14/2019   22:42:47   (  -0.02,-137.11) (  -0.48,-139.08)  224.37                80
 12/15/2019   22:21:23   (  -0.01,-137.09) (   0.58,-134.55)  290.02                80
 12/17/2019   10:45:49   (   0.02,-137.07) (   0.62,-139.82)  312.68                80