Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 4 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/29/2019   22:33:48   (  -0.00,-137.20) (  -0.06,-137.56)   41.01                80
 04/30/2019   22:17:44   (  -0.00,-137.20) (   0.92,-133.03)  475.78                80
 05/02/2019   10:39:33   (   0.00,-137.22) (   0.21,-138.31)  123.45                80
 05/03/2019   10:18:09   (   0.00,-137.22) (  -0.77,-133.77)  392.54                80
 05/04/2019   22:40:06   (  -0.00,-137.20) (  -0.42,-139.08)  214.28                80
 05/05/2019   22:24:02   (   0.00,-137.19) (   0.57,-134.54)  301.55                80
 05/07/2019   10:45:51   (  -0.00,-137.20) (   0.57,-139.82)  298.63                80
 05/08/2019   10:24:26   (  -0.01,-137.19) (  -0.42,-135.29)  216.09                80
 05/09/2019   22:46:24   (   0.01,-137.15) (  -0.76,-140.60)  393.34                80
 05/10/2019   22:30:19   (   0.02,-137.13) (   0.23,-136.06)  121.31                80
 05/12/2019   10:52:09   (  -0.01,-137.13) (   0.91,-141.34)  479.48                80
 05/13/2019   10:30:44   (  -0.01,-137.11) (  -0.08,-136.81)   34.73                80