Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 12 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/15/2019   22:21:23   (  -0.01,-137.22) (   0.56,-134.55)  303.83                80
 12/17/2019   10:45:50   (   0.01,-137.22) (   0.58,-139.82)  296.13                80
 12/18/2019   10:24:24   (   0.00,-137.22) (  -0.43,-135.29)  220.10                80
 12/19/2019   22:49:00   (  -0.01,-137.21) (  -0.77,-140.59)  384.91                80
 12/20/2019   22:27:34   (  -0.00,-137.21) (   0.23,-136.05)  131.25                80
 12/22/2019   10:52:01   (   0.01,-137.20) (   0.96,-141.31)  469.23                80
 12/23/2019   10:30:36   (   0.01,-137.19) (  -0.10,-136.79)   46.50                80
 12/25/2019   22:36:26   (  -0.02,-137.16) (  -0.08,-137.56)   44.38                80
 12/26/2019   22:15:00   (  -0.01,-137.15) (   0.92,-133.02)  470.88                80
 12/28/2019   10:39:27   (   0.02,-137.14) (   0.27,-138.28)  130.87                80
 12/29/2019   10:18:01   (   0.01,-137.12) (  -0.73,-133.75)  383.98                80