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)
 01/23/2020   10:51:36   (   0.05,-137.19) (   0.97,-141.24)  461.79                80
 01/24/2020   10:30:13   (   0.05,-137.18) (  -0.08,-136.72)   53.47                80
 01/26/2020   22:36:05   (  -0.05,-137.16) (  -0.15,-137.48)   37.05                80
 01/27/2020   22:14:41   (  -0.05,-137.15) (   0.91,-132.96)  478.00                80
 01/29/2020   10:39:10   (   0.06,-137.13) (   0.29,-138.23)  125.66                80
 01/30/2020   10:17:45   (   0.05,-137.11) (  -0.71,-133.70)  388.98                80
 01/31/2020   22:42:21   (  -0.06,-137.10) (  -0.51,-139.00)  217.38                80
 02/01/2020   22:20:58   (  -0.06,-137.08) (   0.54,-134.48)  296.97                80
 02/03/2020   10:45:26   (   0.07,-137.04) (   0.66,-139.75)  307.83                80
 02/04/2020   10:24:02   (   0.07,-137.02) (  -0.34,-135.22)  205.90                80
 02/05/2020   22:48:38   (  -0.08,-136.99) (  -0.88,-140.52)  402.08                80