Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 9 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/07/2019   10:40:10   (  -0.02,-137.21) (   0.23,-138.34)  128.99                80
 09/08/2019   10:18:46   (  -0.02,-137.21) (  -0.79,-133.81)  387.29                80
 09/09/2019   22:40:42   (   0.02,-137.19) (  -0.40,-139.11)  218.61                80
 09/10/2019   22:24:38   (   0.02,-137.19) (   0.63,-134.58)  297.56                80
 09/12/2019   10:43:45   (  -0.01,-137.19) (   0.58,-139.84)  302.31                80
 09/13/2019   10:27:41   (  -0.01,-137.19) (  -0.45,-135.31)  213.64                80
 09/14/2019   22:46:57   (   0.01,-137.16) (  -0.74,-140.62)  392.91                80
 09/15/2019   22:30:51   (   0.00,-137.16) (   0.23,-136.07)  122.77                80
 09/17/2019   10:50:00   (  -0.00,-137.15) (   0.92,-141.35)  478.09                80
 09/18/2019   10:33:55   (  -0.00,-137.14) (  -0.11,-136.82)   37.21                80