Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 1 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/26/2020   22:36:05   (  -0.04,-137.21) (  -0.12,-137.49)   31.73                80
 01/27/2020   22:14:42   (  -0.04,-137.21) (   0.93,-132.97)  484.60                80
 01/29/2020   10:39:10   (   0.05,-137.21) (   0.26,-138.24)  116.46                80
 01/30/2020   10:17:46   (   0.05,-137.21) (  -0.74,-133.71)  399.53                80
 01/31/2020   22:42:23   (  -0.05,-137.21) (  -0.43,-139.02)  205.40                80
 02/01/2020   22:20:58   (  -0.05,-137.20) (   0.57,-134.49)  310.28                80
 02/03/2020   10:45:27   (   0.06,-137.19) (   0.62,-139.76)  291.93                80
 02/04/2020   10:24:02   (   0.06,-137.18) (  -0.37,-135.22)  223.15                80
 02/05/2020   22:48:39   (  -0.07,-137.16) (  -0.84,-140.52)  383.36                80
 02/06/2020   22:27:14   (  -0.07,-137.15) (   0.16,-135.99)  131.27                80