Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 9 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/14/2019   22:46:57   (   0.02,-137.16) (  -0.73,-140.62)  393.49                80
 09/15/2019   22:30:51   (   0.02,-137.15) (   0.23,-136.07)  122.05                80
 09/17/2019   10:52:40   (  -0.02,-137.14) (   0.91,-141.35)  479.71                80
 09/18/2019   10:31:15   (  -0.02,-137.12) (  -0.11,-136.82)   35.32                80
 09/20/2019   22:34:26   (   0.02,-137.07) (  -0.10,-137.58)   57.85                80
 09/21/2019   22:18:22   (   0.02,-137.05) (   0.93,-133.05)  456.36                80
 09/23/2019   10:40:09   (  -0.02,-137.02) (   0.28,-138.31)  147.36                80
 09/24/2019   10:18:44   (  -0.02,-136.99) (  -0.74,-133.78)  366.20                80
 09/25/2019   22:40:41   (   0.02,-136.94) (  -0.43,-139.08)  243.28                80
 09/26/2019   22:24:35   (   0.02,-136.91) (   0.54,-134.54)  270.13                80