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   22:33:32   (   0.01,-137.23) (  -0.04,-137.52)   32.59                80
 12/12/2020   22:17:27   (   0.00,-137.22) (   0.98,-132.98)  484.05                80
 12/14/2020   10:36:32   (  -0.00,-137.22) (   0.26,-138.23)  116.58                80
 12/15/2020   10:20:26   (   0.00,-137.21) (  -0.76,-133.70)  399.52                80
 12/16/2020   22:39:42   (  -0.01,-137.20) (  -0.42,-139.00)  206.25                80
 12/17/2020   22:23:36   (  -0.01,-137.19) (   0.60,-134.47)  309.57                80
 12/19/2020   10:42:42   (   0.01,-137.18) (   0.58,-139.74)  291.77                80
 12/20/2020   10:26:37   (   0.01,-137.17) (  -0.44,-135.20)  223.88                80
 12/21/2020   22:45:52   (  -0.00,-137.15) (  -0.73,-140.51)  382.37                80
 12/22/2020   22:29:46   (  -0.01,-137.13) (   0.23,-135.96)  133.18                80
 12/24/2020   10:48:52   (   0.00,-137.12) (   0.95,-141.23)  468.72                80