Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 4 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/15/2020   22:33:46   (   0.02,-137.18) (  -0.09,-137.59)   47.59                80
 04/16/2020   22:17:41   (   0.02,-137.16) (   0.93,-133.06)  467.79                80
 04/18/2020   10:39:28   (  -0.01,-137.14) (   0.27,-138.32)  134.92                80
 04/19/2020   10:18:04   (  -0.02,-137.13) (  -0.76,-133.79)  380.02                80
 04/20/2020   22:40:00   (   0.01,-137.11) (  -0.44,-139.09)  226.36                80
 04/21/2020   22:23:56   (   0.01,-137.10) (   0.58,-134.57)  288.46                80
 04/23/2020   10:45:43   (  -0.01,-137.07) (   0.61,-139.83)  314.96                80
 04/24/2020   10:24:19   (  -0.01,-137.05) (  -0.41,-135.30)  199.21                80
 04/25/2020   22:46:15   (   0.01,-137.01) (  -0.78,-140.60)  408.81                80
 04/26/2020   22:30:11   (   0.01,-136.99) (   0.25,-136.07)  105.06                80
 04/28/2020   10:51:58   (  -0.01,-136.95) (   0.95,-141.34)  499.74                80