Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 12 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)
 12/14/2019   22:42:48   (  -0.01,-137.22) (  -0.45,-139.08)  213.06                80
 12/15/2019   22:21:23   (  -0.00,-137.22) (   0.61,-134.56)  303.45                80
 12/17/2019   10:45:50   (   0.00,-137.22) (   0.58,-139.82)  296.38                80
 12/18/2019   10:24:24   (  -0.00,-137.22) (  -0.42,-135.29)  219.74                80
 12/19/2019   22:49:00   (  -0.00,-137.21) (  -0.78,-140.58)  385.72                80
 12/20/2019   22:27:35   (   0.00,-137.20) (   0.28,-136.06)  130.35                80
 12/22/2019   10:52:01   (   0.01,-137.20) (   0.91,-141.33)  470.01                80
 12/23/2019   10:30:36   (   0.00,-137.19) (  -0.09,-136.79)   45.58                80
 12/25/2019   22:36:26   (  -0.01,-137.15) (  -0.09,-137.56)   45.73                80
 12/26/2019   22:15:00   (  -0.01,-137.14) (   0.91,-133.02)  469.37                80