Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 11 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)
 11/18/2019   22:30:33   (   0.00,-137.20) (   0.23,-136.09)  126.29                80
 11/20/2019   10:52:20   (  -0.01,-137.19) (   0.93,-141.36)  475.67                80
 11/21/2019   10:30:55   (  -0.01,-137.18) (  -0.06,-136.82)   39.87                80
 11/23/2019   22:34:06   (   0.01,-137.16) (  -0.09,-137.60)   50.51                80
 11/24/2019   22:18:00   (   0.00,-137.15) (   0.90,-133.06)  464.79                80
 11/26/2019   10:39:47   (   0.01,-137.12) (   0.31,-138.33)  137.94                80
 11/27/2019   10:18:22   (   0.01,-137.11) (  -0.75,-133.80)  376.79                80
 11/28/2019   22:42:57   (  -0.01,-137.08) (  -0.46,-139.10)  230.32                80
 11/29/2019   22:21:32   (  -0.00,-137.06) (   0.54,-134.57)  284.08                80
 12/01/2019   10:45:59   (   0.01,-137.03) (   0.61,-139.84)  319.61                80
 12/02/2019   10:24:34   (   0.00,-137.01) (  -0.39,-135.31)  194.45                80