Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 1 31.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/31/2020   22:42:23   (  -0.04,-137.21) (  -0.45,-139.01)  205.93                80
 02/01/2020   22:20:58   (  -0.04,-137.20) (   0.55,-134.48)  309.76                80
 02/03/2020   10:45:26   (   0.05,-137.19) (   0.65,-139.75)  292.18                80
 02/04/2020   10:24:03   (   0.05,-137.18) (  -0.41,-135.23)  222.93                80
 02/05/2020   22:45:59   (  -0.06,-137.16) (  -0.81,-140.53)  383.94                80
 02/06/2020   22:29:55   (  -0.06,-137.15) (   0.19,-136.00)  130.66                80
 02/08/2020   10:51:43   (   0.07,-137.12) (   1.00,-141.27)  472.75                80
 02/09/2020   10:30:19   (   0.07,-137.10) (   0.00,-136.74)   41.37                80
 02/11/2020   22:33:31   (  -0.07,-137.05) (  -0.15,-137.52)   53.05                80
 02/12/2020   22:14:47   (  -0.07,-137.03) (   0.85,-132.99)  460.78                80