Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 9 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/15/2020   10:27:26   (   0.04,-137.19) (  -0.38,-135.27)  219.25                80
 09/16/2020   22:46:44   (  -0.03,-137.19) (  -0.78,-140.58)  385.54                80
 09/17/2020   22:30:39   (  -0.03,-137.19) (   0.23,-136.05)  130.56                80
 09/19/2020   10:49:48   (   0.03,-137.18) (   0.94,-141.32)  470.82                80
 09/20/2020   10:33:43   (   0.03,-137.18) (  -0.06,-136.78)   44.89                80
 09/22/2020   22:34:15   (  -0.03,-137.15) (  -0.14,-137.55)   45.88                80
 09/23/2020   22:18:10   (  -0.03,-137.14) (   0.87,-133.02)  469.19                80
 09/25/2020   10:37:19   (   0.02,-137.12) (   0.31,-138.29)  134.02                80
 09/26/2020   10:21:15   (   0.02,-137.10) (  -0.76,-133.77)  380.66                80
 09/27/2020   22:40:32   (  -0.01,-137.08) (  -0.45,-139.07)  226.51                80