Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 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)
 12/11/2020   22:33:31   (   0.01,-137.22) (  -0.08,-137.51)   32.83                80
 12/12/2020   22:17:26   (   0.00,-137.22) (   0.94,-132.97)  483.73                80
 12/14/2020   10:36:32   (   0.00,-137.21) (   0.24,-138.24)  117.02                80
 12/15/2020   10:20:27   (   0.01,-137.21) (  -0.78,-133.71)  398.92                80
 12/16/2020   22:39:42   (  -0.01,-137.19) (  -0.40,-139.01)  207.02                80
 12/17/2020   22:23:36   (  -0.01,-137.18) (   0.62,-134.47)  308.71                80
 12/19/2020   10:42:43   (   0.01,-137.17) (   0.56,-139.74)  292.77                80
 12/20/2020   10:26:37   (   0.01,-137.16) (  -0.46,-135.21)  222.80                80
 12/21/2020   22:45:52   (  -0.01,-137.13) (  -0.77,-140.50)  383.66                80
 12/22/2020   22:29:46   (  -0.01,-137.12) (   0.25,-135.96)  131.75                80