Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 11 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/19/2020   22:46:18   (  -0.01,-137.19) (  -0.75,-140.57)  385.37                80
 11/20/2020   22:30:13   (  -0.01,-137.18) (   0.25,-136.04)  130.16                80
 11/22/2020   10:49:19   (   0.01,-137.16) (   0.94,-141.30)  471.69                80
 11/23/2020   10:33:14   (   0.01,-137.15) (  -0.06,-136.77)   43.74                80
 11/25/2020   22:33:43   (  -0.01,-137.12) (  -0.12,-137.53)   47.88                80
 11/26/2020   22:17:38   (  -0.01,-137.10) (   0.89,-133.00)  467.25                80
 11/28/2020   10:36:45   (   0.01,-137.08) (   0.25,-138.28)  135.48                80
 11/29/2020   10:20:40   (   0.01,-137.06) (  -0.76,-133.74)  379.17                80
 11/30/2020   22:39:54   (  -0.01,-137.03) (  -0.48,-139.03)  229.11                80
 12/01/2020   22:23:49   (  -0.01,-137.00) (   0.52,-134.50)  284.98                80