Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 1 13.  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   10:39:14   (   0.03,-137.21) (   0.29,-138.24)  117.71                80
 01/14/2020   10:17:50   (   0.03,-137.21) (  -0.78,-133.72)  398.98                80
 01/15/2020   22:42:24   (  -0.04,-137.21) (  -0.46,-139.01)  205.46                80
 01/16/2020   22:20:58   (  -0.03,-137.21) (   0.56,-134.47)  311.10                80
 01/18/2020   10:45:26   (   0.04,-137.21) (   0.58,-139.75)  288.87                80
 01/19/2020   10:24:00   (   0.04,-137.20) (  -0.43,-135.21)  227.23                80
 01/20/2020   22:48:35   (  -0.05,-137.18) (  -0.79,-140.50)  378.38                80
 01/21/2020   22:27:09   (  -0.05,-137.18) (   0.22,-135.97)  137.43                80
 01/23/2020   10:51:35   (   0.06,-137.17) (   0.98,-141.23)  463.44                80
 01/24/2020   10:30:10   (   0.06,-137.16) (  -0.04,-136.70)   51.94                80
 01/26/2020   22:35:59   (  -0.06,-137.12) (  -0.17,-137.46)   39.44                80