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)
 09/08/2019   10:18:46   (  -0.02,-137.21) (  -0.78,-133.81)  387.29                80
 09/09/2019   22:40:42   (   0.02,-137.19) (  -0.41,-139.11)  218.70                80
 09/10/2019   22:24:37   (   0.02,-137.19) (   0.61,-134.58)  297.38                80
 09/12/2019   10:46:25   (  -0.01,-137.19) (   0.59,-139.84)  302.53                80
 09/13/2019   10:27:40   (  -0.01,-137.18) (  -0.43,-135.31)  213.37                80
 09/14/2019   22:46:57   (   0.01,-137.16) (  -0.75,-140.61)  393.27                80
 09/15/2019   22:30:52   (   0.01,-137.15) (   0.28,-136.08)  122.39                80
 09/17/2019   10:49:59   (  -0.01,-137.15) (   0.93,-141.35)  478.51                80
 09/18/2019   10:33:55   (  -0.01,-137.13) (  -0.09,-136.82)   36.63                80
 09/20/2019   22:34:26   (   0.01,-137.08) (  -0.11,-137.58)   57.04                80
 09/21/2019   22:18:21   (   0.02,-137.06) (   0.91,-133.05)  457.23                80