Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 9 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/09/2019   22:40:42   (   0.02,-137.19) (  -0.39,-139.11)  218.74                80
 09/10/2019   22:24:38   (   0.02,-137.19) (   0.63,-134.58)  297.31                80
 09/12/2019   10:46:25   (  -0.02,-137.19) (   0.57,-139.85)  302.82                80
 09/13/2019   10:25:01   (  -0.02,-137.18) (  -0.45,-135.32)  213.01                80
 09/14/2019   22:46:57   (   0.02,-137.16) (  -0.73,-140.62)  393.63                80
 09/15/2019   22:30:51   (   0.01,-137.15) (   0.23,-136.07)  121.96                80
 09/17/2019   10:50:00   (  -0.01,-137.14) (   0.91,-141.35)  479.10                80
 09/18/2019   10:33:55   (  -0.01,-137.13) (  -0.11,-136.82)   36.04                80
 09/20/2019   22:34:26   (   0.02,-137.07) (  -0.10,-137.58)   57.71                80
 09/21/2019   22:18:22   (   0.02,-137.05) (   0.93,-133.05)  456.54                80