Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 4 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/30/2019   22:17:44   (  -0.00,-137.20) (   0.94,-133.03)  475.37                80
 05/02/2019   10:39:33   (   0.00,-137.21) (   0.25,-138.30)  123.70                80
 05/03/2019   10:18:09   (   0.00,-137.21) (  -0.79,-133.78)  392.27                80
 05/04/2019   22:40:06   (  -0.00,-137.19) (  -0.40,-139.08)  214.67                80
 05/05/2019   22:24:02   (  -0.00,-137.19) (   0.59,-134.55)  301.17                80
 05/07/2019   10:45:50   (  -0.00,-137.20) (   0.61,-139.82)  298.90                80
 05/08/2019   10:24:27   (  -0.01,-137.19) (  -0.44,-135.29)  215.84                80
 05/09/2019   22:46:24   (   0.01,-137.14) (  -0.74,-140.60)  393.67                80
 05/10/2019   22:30:20   (   0.02,-137.13) (   0.25,-136.07)  120.94                80
 05/12/2019   10:52:08   (  -0.02,-137.13) (   0.95,-141.33)  479.85                80
 05/13/2019   10:30:44   (  -0.01,-137.11) (  -0.09,-136.81)   34.36                80