Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 4 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/23/2019   22:46:14   (  -0.00,-137.19) (  -0.74,-140.57)  384.63                80
 04/24/2019   22:30:10   (  -0.00,-137.19) (   0.25,-136.03)  131.33                80
 04/26/2019   10:51:59   (   0.00,-137.20) (   0.89,-141.31)  468.57                80
 04/27/2019   10:30:35   (   0.00,-137.19) (  -0.09,-136.78)   46.63                80
 04/29/2019   22:33:48   (  -0.00,-137.15) (  -0.12,-137.55)   46.30                80
 04/30/2019   22:17:44   (  -0.00,-137.14) (   0.93,-133.03)  469.13                80
 05/02/2019   10:39:32   (   0.00,-137.15) (   0.28,-138.29)  131.40                80
 05/03/2019   10:18:09   (   0.00,-137.13) (  -0.77,-133.77)  383.11                80
 05/04/2019   22:40:06   (   0.00,-137.08) (  -0.42,-139.08)  226.80                80
 05/05/2019   22:24:02   (   0.00,-137.07) (   0.57,-134.55)  287.62                80