Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 12 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/01/2020   22:23:50   (  -0.01,-137.23) (   0.60,-134.51)  309.81                80
 12/03/2020   10:42:56   (   0.00,-137.22) (   0.58,-139.77)  291.16                80
 12/04/2020   10:26:51   (   0.01,-137.21) (  -0.43,-135.24)  224.48                80
 12/05/2020   22:46:06   (  -0.00,-137.19) (  -0.76,-140.54)  382.29                80
 12/06/2020   22:30:01   (  -0.01,-137.18) (   0.25,-136.01)  133.04                80
 12/08/2020   10:49:07   (   0.00,-137.16) (   0.93,-141.27)  468.86                80
 12/09/2020   10:33:01   (   0.00,-137.14) (  -0.08,-136.74)   46.10                80
 12/11/2020   22:33:31   (  -0.00,-137.09) (  -0.08,-137.51)   47.14                80
 12/12/2020   22:17:26   (  -0.01,-137.07) (   0.93,-132.97)  467.28                80
 12/14/2020   10:39:12   (   0.00,-137.04) (   0.25,-138.24)  136.20                80