Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 1 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)
 01/13/2020   10:39:15   (   0.04,-137.21) (   0.26,-138.25)  117.78                80
 01/14/2020   10:17:49   (   0.03,-137.21) (  -0.75,-133.71)  398.96                80
 01/15/2020   22:42:24   (  -0.04,-137.21) (  -0.43,-139.01)  205.19                80
 01/16/2020   22:20:59   (  -0.04,-137.21) (   0.59,-134.48)  311.44                80
 01/18/2020   10:45:25   (   0.05,-137.21) (   0.61,-139.74)  288.40                80
 01/19/2020   10:24:00   (   0.04,-137.21) (  -0.40,-135.21)  227.76                80
 01/20/2020   22:48:34   (  -0.05,-137.19) (  -0.82,-140.50)  377.54                80
 01/21/2020   22:27:09   (  -0.05,-137.18) (   0.19,-135.96)  138.40                80
 01/23/2020   10:51:36   (   0.06,-137.18) (   0.95,-141.24)  462.42                80
 01/24/2020   10:30:10   (   0.06,-137.16) (  -0.07,-136.70)   53.12                80