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

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/12/2019   10:39:38   (   0.00,-137.20) (   0.24,-138.32)  127.05                80
 12/13/2019   10:18:13   (  -0.00,-137.18) (  -0.76,-133.78)  387.02                80
 12/14/2019   22:42:48   (  -0.00,-137.13) (  -0.44,-139.08)  222.13                80
 12/15/2019   22:21:23   (   0.01,-137.11) (   0.56,-134.55)  291.41                80
 12/17/2019   10:45:49   (  -0.00,-137.07) (   0.63,-139.81)  312.74                80
 12/18/2019   10:24:24   (  -0.01,-137.04) (  -0.43,-135.29)  200.54                80
 12/19/2019   22:48:59   (   0.01,-136.99) (  -0.83,-140.57)  409.46                80
 12/20/2019   22:27:34   (   0.01,-136.96) (   0.23,-136.05)  103.63                80
 12/23/2019   10:30:35   (  -0.00,-136.88) (  -0.04,-136.78)   11.64                80
 12/25/2019   22:36:24   (  -0.01,-136.77) (  -0.20,-137.53)   87.13                80