Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 9 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/23/2020   22:18:11   (  -0.05,-137.20) (   0.91,-133.02)  477.12                80
 09/25/2020   10:37:19   (   0.04,-137.21) (   0.27,-138.29)  122.47                80
 09/26/2020   10:21:15   (   0.04,-137.21) (  -0.74,-133.76)  393.77                80
 09/27/2020   22:40:31   (  -0.03,-137.20) (  -0.46,-139.06)  212.18                80
 09/28/2020   22:24:27   (  -0.03,-137.20) (   0.55,-134.53)  303.99                80
 09/30/2020   10:43:35   (   0.02,-137.20) (   0.63,-139.80)  295.99                80
 10/01/2020   10:27:31   (   0.03,-137.20) (  -0.38,-135.26)  220.09                80
 10/02/2020   22:46:48   (  -0.02,-137.18) (  -0.76,-140.58)  386.28                80
 10/03/2020   22:30:43   (  -0.03,-137.17) (   0.26,-136.04)  129.51                80
 10/05/2020   10:49:51   (   0.02,-137.17) (   0.98,-141.30)  471.46                80
 10/06/2020   10:33:46   (   0.02,-137.16) (  -0.03,-136.77)   43.86                80