Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 12 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/07/2019   10:30:46   (   0.00,-137.20) (  -0.06,-136.81)   44.25                80
 12/09/2019   22:36:37   (  -0.01,-137.18) (  -0.08,-137.58)   45.64                80
 12/10/2019   22:15:11   (  -0.01,-137.17) (   0.92,-133.05)  469.98                80
 12/12/2019   10:39:38   (   0.02,-137.16) (   0.28,-138.31)  131.42                80
 12/13/2019   10:18:12   (   0.01,-137.14) (  -0.72,-133.78)  383.45                80
 12/14/2019   22:42:47   (  -0.02,-137.11) (  -0.48,-139.07)  224.34                80
 12/15/2019   22:21:23   (  -0.01,-137.09) (   0.58,-134.55)  290.08                80
 12/17/2019   10:45:49   (   0.02,-137.07) (   0.62,-139.81)  312.72                80
 12/18/2019   10:24:24   (   0.01,-137.05) (  -0.38,-135.28)  201.34                80
 12/19/2019   22:48:59   (  -0.02,-137.00) (  -0.81,-140.58)  407.30                80