Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 12 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)
 12/08/2020   10:49:07   (  -0.01,-137.22) (   0.90,-141.28)  462.10                80
 12/09/2020   10:33:02   (  -0.01,-137.22) (  -0.11,-136.74)   54.62                80
 12/11/2020   22:33:32   (   0.00,-137.21) (  -0.06,-137.51)   33.88                80
 12/12/2020   22:17:26   (  -0.00,-137.21) (   0.96,-132.98)  482.30                80
 12/14/2020   10:36:32   (   0.00,-137.20) (   0.22,-138.24)  118.78                80
 12/15/2020   10:20:27   (   0.01,-137.19) (  -0.80,-133.71)  396.87                80
 12/16/2020   22:39:41   (  -0.01,-137.16) (  -0.44,-139.00)  209.67                80
 12/17/2020   22:23:36   (  -0.01,-137.15) (   0.58,-134.47)  305.76                80
 12/19/2020   10:45:22   (   0.01,-137.14) (   0.60,-139.73)  296.02                80
 12/20/2020   10:23:57   (   0.01,-137.12) (  -0.42,-135.20)  219.22                80
 12/21/2020   22:45:52   (  -0.00,-137.10) (  -0.75,-140.50)  387.80                80