Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 12 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/14/2019   22:42:49   (  -0.01,-137.22) (  -0.41,-139.09)  212.94                80
 12/15/2019   22:21:23   (  -0.00,-137.22) (   0.59,-134.55)  303.61                80
 12/17/2019   10:45:49   (   0.01,-137.22) (   0.60,-139.82)  296.26                80
 12/18/2019   10:24:25   (  -0.00,-137.22) (  -0.46,-135.29)  219.94                80
 12/19/2019   22:49:00   (  -0.00,-137.21) (  -0.74,-140.59)  385.34                80
 12/20/2019   22:27:35   (   0.00,-137.20) (   0.27,-136.06)  130.75                80
 12/22/2019   10:52:01   (   0.01,-137.20) (   0.93,-141.32)  469.62                80
 12/23/2019   10:30:36   (   0.01,-137.19) (  -0.07,-136.79)   46.01                80
 12/25/2019   22:36:25   (  -0.01,-137.16) (  -0.11,-137.55)   45.05                80
 12/26/2019   22:15:00   (  -0.01,-137.15) (   0.90,-133.02)  470.11                80
 12/28/2019   10:39:26   (   0.02,-137.13) (   0.30,-138.28)  131.62                80