Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 9 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/27/2020   22:40:30   (  -0.04,-137.20) (  -0.44,-139.07)  212.73                80
 09/28/2020   22:24:24   (  -0.04,-137.19) (   0.55,-134.53)  303.18                80
 09/30/2020   10:43:32   (   0.03,-137.19) (   0.63,-139.80)  297.61                80
 10/01/2020   10:27:27   (   0.03,-137.19) (  -0.41,-135.28)  218.17                80
 10/02/2020   22:46:42   (  -0.03,-137.17) (  -0.80,-140.58)  388.62                80
 10/03/2020   22:30:37   (  -0.03,-137.16) (   0.19,-136.04)  126.90                80
 10/05/2020   10:49:45   (   0.03,-137.15) (   0.93,-141.33)  474.86                80
 10/06/2020   10:33:40   (   0.03,-137.14) (  -0.05,-136.79)   40.07                80
 10/08/2020   22:34:10   (  -0.03,-137.09) (  -0.16,-137.55)   53.98                80
 10/09/2020   22:18:05   (  -0.03,-137.07) (   0.89,-133.03)  460.24                80
 10/11/2020   10:37:12   (   0.02,-137.04) (   0.30,-138.30)  143.52                80