Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 1 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/21/2020   22:27:09   (  -0.04,-137.21) (   0.22,-135.97)  140.72                80
 01/23/2020   10:51:35   (   0.05,-137.19) (   0.98,-141.23)  461.10                80
 01/24/2020   10:30:10   (   0.05,-137.18) (  -0.04,-136.70)   54.88                80
 01/26/2020   22:36:00   (  -0.05,-137.17) (  -0.11,-137.47)   33.73                80
 01/27/2020   22:14:34   (  -0.05,-137.16) (   0.90,-132.93)  481.95                80
 01/29/2020   10:39:01   (   0.06,-137.14) (   0.29,-138.19)  120.57                80
 01/30/2020   10:17:35   (   0.05,-137.12) (  -0.72,-133.66)  394.78                80
 01/31/2020   22:42:09   (  -0.06,-137.11) (  -0.49,-138.95)  210.46                80
 02/01/2020   22:20:44   (  -0.06,-137.09) (   0.52,-134.42)  304.61                80
 02/03/2020   10:45:10   (   0.07,-137.06) (   0.67,-139.68)  299.08                80
 02/04/2020   10:23:45   (   0.07,-137.04) (  -0.34,-135.15)  215.39                80