Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 9 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/17/2019   10:52:40   (  -0.02,-137.20) (   0.88,-141.35)  472.27                80
 09/18/2019   10:31:15   (  -0.02,-137.21) (  -0.08,-136.81)   44.72                80
 09/20/2019   22:34:27   (   0.02,-137.20) (  -0.07,-137.58)   43.67                80
 09/21/2019   22:18:22   (   0.02,-137.20) (   0.96,-133.05)  472.47                80
 09/23/2019   10:40:09   (  -0.02,-137.19) (   0.25,-138.32)  128.16                80
 09/24/2019   10:18:45   (  -0.02,-137.19) (  -0.78,-133.79)  387.37                80
 09/25/2019   22:40:41   (   0.02,-137.16) (  -0.39,-139.09)  219.19                80
 09/26/2019   22:24:37   (   0.03,-137.15) (   0.64,-134.56)  296.16                80
 09/28/2019   10:46:24   (  -0.03,-137.14) (   0.57,-139.82)  305.41                80
 09/29/2019   10:25:00   (  -0.03,-137.13) (  -0.46,-135.29)  209.68                80
 09/30/2019   22:46:55   (   0.02,-137.10) (  -0.76,-140.58)  397.64                80