Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 9 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)
 09/30/2019   22:49:35   (   0.02,-137.20) (  -0.76,-140.60)  387.68                80
 10/01/2019   22:28:10   (   0.02,-137.20) (   0.27,-136.07)  128.59                80
 10/03/2019   10:52:38   (   0.00,-137.20) (   0.92,-141.34)  471.98                80
 10/04/2019   10:31:13   (   0.00,-137.19) (  -0.11,-136.82)   43.72                80
 10/06/2019   22:37:04   (  -0.00,-137.17) (  -0.07,-137.59)   47.69                80
 10/07/2019   22:15:39   (   0.00,-137.16) (   0.90,-133.05)  467.52                80
 10/09/2019   10:40:07   (  -0.00,-137.15) (   0.23,-138.33)  134.46                80
 10/10/2019   10:18:41   (  -0.00,-137.14) (  -0.74,-133.79)  380.57                80
 10/11/2019   22:43:17   (  -0.01,-137.11) (  -0.47,-139.09)  226.62                80
 10/12/2019   22:21:52   (  -0.01,-137.10) (   0.57,-134.57)  288.32                80