Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 3 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/30/2020   22:33:45   (   0.02,-137.21) (  -0.04,-137.60)   43.72                80
 03/31/2020   22:17:41   (   0.02,-137.21) (   0.97,-133.07)  472.58                80
 04/02/2020   10:39:28   (  -0.02,-137.21) (   0.23,-138.33)  127.35                80
 04/03/2020   10:18:04   (  -0.01,-137.21) (  -0.79,-133.80)  388.37                80
 04/04/2020   22:40:00   (   0.01,-137.18) (  -0.42,-139.10)  218.48                80
 04/05/2020   22:23:56   (   0.01,-137.18) (   0.60,-134.57)  297.05                80
 04/07/2020   10:45:43   (  -0.00,-137.17) (   0.61,-139.83)  303.70                80
 04/08/2020   10:24:18   (  -0.01,-137.16) (  -0.41,-135.30)  211.32                80
 04/09/2020   22:46:15   (   0.01,-137.13) (  -0.79,-140.61)  396.95                80
 04/10/2020   22:30:10   (   0.01,-137.11) (   0.23,-136.08)  117.77                80
 04/12/2020   10:51:59   (  -0.01,-137.10) (   0.91,-141.35)  484.04                80