Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 12 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/09/2019   22:33:57   (  -0.01,-137.17) (  -0.08,-137.59)   46.92                80
 12/10/2019   22:15:11   (  -0.01,-137.15) (   0.92,-133.05)  468.15                80
 12/12/2019   10:39:38   (   0.01,-137.13) (   0.27,-138.31)  134.33                80
 12/13/2019   10:18:12   (   0.01,-137.11) (  -0.73,-133.78)  379.90                80
 12/14/2019   22:42:48   (  -0.01,-137.07) (  -0.48,-139.08)  228.88                80
 12/15/2019   22:21:22   (  -0.00,-137.05) (   0.53,-134.54)  284.91                80
 12/17/2019   10:45:49   (   0.01,-137.01) (   0.61,-139.82)  319.02                80
 12/18/2019   10:24:24   (  -0.00,-136.99) (  -0.39,-135.28)  194.43                80
 12/19/2019   22:48:59   (  -0.00,-136.94) (  -0.81,-140.58)  415.18                80
 12/20/2019   22:27:34   (   0.00,-136.91) (   0.19,-136.05)   98.12                80