Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 10 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/18/2020   22:46:36   (  -0.03,-137.20) (  -0.81,-140.58)  385.74                80
 10/19/2020   22:30:31   (  -0.03,-137.20) (   0.24,-136.06)  130.22                80
 10/21/2020   10:49:38   (   0.03,-137.19) (   0.94,-141.33)  471.17                80
 10/22/2020   10:33:33   (   0.03,-137.18) (  -0.05,-136.79)   44.30                80
 10/24/2020   22:34:04   (  -0.02,-137.15) (  -0.09,-137.57)   47.28                80
 10/25/2020   22:17:58   (  -0.02,-137.14) (   0.90,-133.04)  468.04                80
 10/27/2020   10:37:06   (   0.01,-137.13) (   0.27,-138.31)  133.98                80
 10/28/2020   10:21:00   (   0.01,-137.12) (  -0.72,-133.77)  381.17                80
 10/29/2020   22:40:15   (  -0.01,-137.09) (  -0.47,-139.07)  226.15                80
 10/30/2020   22:24:11   (  -0.01,-137.08) (   0.58,-134.55)  288.75                80