Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2019 12 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/10/2019   22:15:11   (  -0.01,-137.20) (   0.91,-133.05)  472.98                80
 12/12/2019   10:39:37   (   0.02,-137.22) (   0.29,-138.31)  125.29                80
 12/13/2019   10:18:13   (   0.01,-137.22) (  -0.77,-133.79)  391.52                80
 12/14/2019   22:42:48   (  -0.01,-137.21) (  -0.43,-139.08)  213.61                80
 12/15/2019   22:21:23   (  -0.01,-137.21) (   0.57,-134.55)  302.74                80
 12/17/2019   10:45:50   (   0.01,-137.22) (   0.57,-139.82)  296.86                80
 12/18/2019   10:24:25   (   0.00,-137.21) (  -0.43,-135.29)  219.14                80
 12/19/2019   22:49:00   (  -0.01,-137.19) (  -0.76,-140.59)  386.90                80
 12/20/2019   22:27:34   (  -0.00,-137.19) (   0.24,-136.05)  128.97                80
 12/22/2019   10:52:01   (   0.02,-137.19) (   0.96,-141.32)  471.19                80
 12/23/2019   10:30:36   (   0.01,-137.18) (  -0.10,-136.79)   44.35                80