Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 9 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/14/2020   10:43:31   (   0.04,-137.19) (   0.64,-139.80)  297.08                80
 09/15/2020   10:27:26   (   0.04,-137.19) (  -0.37,-135.27)  219.13                80
 09/16/2020   22:46:43   (  -0.03,-137.19) (  -0.79,-140.58)  385.72                80
 09/17/2020   22:30:39   (  -0.03,-137.19) (   0.22,-136.04)  130.32                80
 09/19/2020   10:49:47   (   0.03,-137.18) (   0.96,-141.31)  471.21                80
 09/20/2020   10:33:43   (   0.03,-137.17) (  -0.05,-136.78)   44.44                80
 09/22/2020   22:34:16   (  -0.03,-137.15) (  -0.09,-137.56)   46.45                80
 09/23/2020   22:18:11   (  -0.03,-137.13) (   0.91,-133.03)  468.57                80
 09/25/2020   10:37:19   (   0.02,-137.11) (   0.26,-138.30)  134.75                80
 09/26/2020   10:21:15   (   0.02,-137.09) (  -0.74,-133.76)  379.85                80