Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 4 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/21/2019   10:45:41   (   0.00,-137.21) (   0.58,-139.79)  294.05                80
 04/22/2019   10:24:17   (   0.00,-137.20) (  -0.46,-135.26)  221.78                80
 04/23/2019   22:46:14   (  -0.00,-137.19) (  -0.75,-140.57)  385.20                80
 04/24/2019   22:30:10   (   0.00,-137.19) (   0.23,-136.03)  130.74                80
 04/26/2019   10:51:59   (  -0.00,-137.20) (   0.92,-141.31)  468.94                80
 04/27/2019   10:30:36   (  -0.00,-137.19) (  -0.12,-136.79)   46.29                80
 04/29/2019   22:33:49   (   0.00,-137.15) (  -0.11,-137.56)   47.05                80
 04/30/2019   22:17:45   (   0.00,-137.14) (   0.93,-133.04)  468.23                80
 05/02/2019   10:39:34   (  -0.00,-137.15) (   0.23,-138.31)  132.17                80
 05/03/2019   10:18:10   (  -0.01,-137.13) (  -0.74,-133.78)  382.21                80
 05/04/2019   22:40:07   (   0.01,-137.09) (  -0.46,-139.08)  228.18                80