Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 1 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/24/2020   10:30:12   (   0.04,-137.20) (  -0.05,-136.71)   55.97                80
 01/26/2020   22:36:05   (  -0.05,-137.21) (  -0.13,-137.49)   31.90                80
 01/27/2020   22:14:42   (  -0.05,-137.21) (   0.93,-132.97)  484.30                80
 01/29/2020   10:39:10   (   0.05,-137.21) (   0.27,-138.24)  116.95                80
 01/30/2020   10:17:46   (   0.05,-137.21) (  -0.73,-133.70)  398.92                80
 01/31/2020   22:42:23   (  -0.06,-137.20) (  -0.44,-139.02)  206.08                80
 02/01/2020   22:20:58   (  -0.06,-137.20) (   0.56,-134.48)  309.46                80
 02/03/2020   10:45:27   (   0.07,-137.18) (   0.64,-139.75)  292.95                80
 02/04/2020   10:24:02   (   0.07,-137.17) (  -0.36,-135.22)  222.01                80
 02/05/2020   22:48:40   (  -0.08,-137.15) (  -0.80,-140.53)  384.60                80