Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 6 3.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/03/2021   10:30:31   (   0.00,-137.19) (  -0.11,-136.79)   46.67                80
 06/05/2021   22:36:23   (  -0.00,-137.19) (  -0.10,-137.56)   42.61                80
 06/06/2021   22:15:00   (   0.00,-137.18) (   0.94,-133.03)  472.99                80
 06/08/2021   10:39:28   (   0.00,-137.17) (   0.27,-138.30)  129.02                80
 06/09/2021   10:18:05   (  -0.01,-137.16) (  -0.78,-133.78)  385.97                80
 06/10/2021   22:40:02   (   0.01,-137.14) (  -0.41,-139.08)  220.78                80
 06/11/2021   22:23:58   (   0.01,-137.13) (   0.58,-134.55)  293.87                80
 06/13/2021   10:45:47   (  -0.01,-137.10) (   0.57,-139.83)  309.55                80
 06/14/2021   10:24:22   (  -0.01,-137.09) (  -0.41,-135.29)  204.65                80
 06/15/2021   22:46:20   (   0.01,-137.05) (  -0.76,-140.60)  403.38                80
 06/16/2021   22:30:15   (   0.01,-137.03) (   0.22,-136.06)  110.64                80