Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 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)
 12/18/2019   10:24:24   (   0.00,-137.22) (  -0.41,-135.28)  220.41                80
 12/19/2019   22:48:59   (  -0.01,-137.22) (  -0.79,-140.58)  384.18                80
 12/20/2019   22:27:35   (  -0.01,-137.21) (   0.27,-136.06)  132.14                80
 12/22/2019   10:52:01   (   0.01,-137.21) (   0.92,-141.32)  468.38                80
 12/23/2019   10:30:36   (   0.01,-137.20) (  -0.08,-136.79)   47.46                80
 12/25/2019   22:36:26   (  -0.02,-137.18) (  -0.10,-137.55)   42.72                80
 12/26/2019   22:15:00   (  -0.01,-137.17) (   0.90,-133.02)  472.63                80
 12/28/2019   10:39:26   (   0.02,-137.15) (   0.29,-138.28)  129.20                80
 12/29/2019   10:18:02   (   0.01,-137.14) (  -0.77,-133.76)  385.84                80
 12/30/2019   22:42:36   (  -0.02,-137.11) (  -0.47,-139.05)  220.83                80