Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 5 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/04/2019   22:40:06   (  -0.00,-137.19) (  -0.42,-139.08)  215.25                80
 05/05/2019   22:24:02   (  -0.00,-137.19) (   0.57,-134.54)  301.11                80
 05/07/2019   10:45:51   (   0.00,-137.20) (   0.57,-139.82)  298.09                80
 05/08/2019   10:24:26   (   0.00,-137.20) (  -0.41,-135.29)  217.24                80
 05/09/2019   22:46:24   (   0.00,-137.16) (  -0.77,-140.60)  391.48                80
 05/10/2019   22:30:19   (   0.00,-137.15) (   0.22,-136.06)  123.71                80
 05/12/2019   10:52:09   (  -0.00,-137.16) (   0.92,-141.34)  476.35                80
 05/13/2019   10:30:44   (  -0.00,-137.14) (  -0.07,-136.81)   38.26                80
 05/15/2019   22:33:57   (   0.00,-137.08) (  -0.12,-137.58)   57.10                80
 05/16/2019   22:17:53   (   0.01,-137.07) (   0.93,-133.06)  457.49                80