Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 8 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/22/2019   10:40:10   (  -0.03,-137.21) (   0.20,-138.36)  131.15                80
 08/23/2019   10:18:46   (  -0.03,-137.21) (  -0.81,-133.83)  385.47                80
 08/24/2019   22:40:42   (   0.03,-137.21) (  -0.39,-139.13)  219.32                80
 08/25/2019   22:24:38   (   0.04,-137.20) (   0.63,-134.60)  296.69                80
 08/27/2019   10:46:25   (  -0.04,-137.20) (   0.58,-139.86)  304.63                80
 08/28/2019   10:25:00   (  -0.04,-137.19) (  -0.44,-135.33)  210.89                80
 08/29/2019   22:46:57   (   0.04,-137.17) (  -0.76,-140.63)  395.29                80
 08/30/2019   22:30:52   (   0.04,-137.16) (   0.26,-136.10)  120.09                80
 09/01/2019   10:52:40   (  -0.04,-137.14) (   0.88,-141.38)  481.93                80
 09/02/2019   10:31:15   (  -0.04,-137.13) (  -0.08,-136.83)   33.31                80