Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 5 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/28/2019   10:52:16   (   0.00,-137.21) (   0.95,-141.36)  473.39                80
 05/29/2019   10:30:53   (   0.00,-137.21) (  -0.10,-136.83)   42.72                80
 05/31/2019   22:34:05   (   0.00,-137.18) (  -0.07,-137.61)   48.66                80
 06/01/2019   22:18:01   (   0.01,-137.17) (   0.93,-133.08)  467.10                80
 06/03/2019   10:39:49   (  -0.01,-137.18) (   0.27,-138.35)  133.01                80
 06/04/2019   10:18:26   (  -0.01,-137.17) (  -0.79,-133.83)  381.72                80
 06/05/2019   22:40:22   (   0.02,-137.12) (  -0.43,-139.12)  227.86                80
 06/06/2019   22:24:18   (   0.02,-137.11) (   0.57,-134.59)  286.74                80
 06/08/2019   10:46:07   (  -0.02,-137.11) (   0.57,-139.87)  314.37                80
 06/09/2019   10:24:42   (  -0.02,-137.09) (  -0.43,-135.34)  199.76                80