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

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/18/2019   22:39:56   (  -0.00,-137.18) (  -0.41,-139.04)  211.70                80
 04/19/2019   22:23:52   (   0.00,-137.18) (   0.57,-134.51)  304.15                80
 04/21/2019   10:45:41   (  -0.00,-137.19) (   0.57,-139.79)  295.75                80
 04/22/2019   10:24:16   (  -0.01,-137.18) (  -0.42,-135.25)  219.14                80
 04/23/2019   22:46:15   (   0.02,-137.14) (  -0.72,-140.57)  390.07                80
 04/24/2019   22:30:10   (   0.02,-137.13) (   0.26,-136.04)  124.99                80
 04/26/2019   10:51:58   (  -0.01,-137.14) (   0.94,-141.30)  475.01                80
 04/27/2019   10:30:35   (  -0.01,-137.12) (  -0.10,-136.78)   39.49                80
 04/29/2019   22:33:48   (   0.01,-137.06) (  -0.11,-137.55)   56.49                80
 04/30/2019   22:17:44   (   0.01,-137.04) (   0.94,-133.03)  457.99                80