Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 6 3.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/04/2019   10:18:26   (  -0.02,-137.21) (  -0.79,-133.82)  386.28                80
 06/05/2019   22:40:22   (   0.01,-137.19) (  -0.43,-139.12)  220.59                80
 06/06/2019   22:24:18   (   0.00,-137.19) (   0.57,-134.59)  295.68                80
 06/08/2019   10:46:07   (  -0.00,-137.20) (   0.57,-139.87)  303.18                80
 06/09/2019   10:24:42   (   0.01,-137.20) (  -0.43,-135.34)  212.61                80
 06/10/2019   22:46:39   (  -0.01,-137.16) (  -0.79,-140.63)  395.73                80
 06/11/2019   22:30:34   (  -0.01,-137.15) (   0.21,-136.10)  119.93                80
 06/13/2019   10:52:23   (   0.00,-137.17) (   0.92,-141.38)  479.55                80
 06/14/2019   10:33:39   (   0.00,-137.16) (  -0.08,-136.85)   35.57                80
 06/16/2019   22:34:11   (   0.00,-137.10) (  -0.14,-137.61)   59.37                80