Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 6 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/02/2021   10:51:55   (   0.01,-137.20) (   0.91,-141.31)  469.09                80
 06/03/2021   10:30:30   (   0.00,-137.20) (  -0.07,-136.78)   47.10                80
 06/05/2021   22:33:44   (  -0.00,-137.19) (  -0.07,-137.56)   41.81                80
 06/06/2021   22:17:39   (   0.00,-137.19) (   0.91,-133.03)  474.02                80
 06/08/2021   10:39:29   (  -0.00,-137.18) (   0.24,-138.31)  127.55                80
 06/09/2021   10:18:04   (  -0.01,-137.18) (  -0.75,-133.77)  387.68                80
 06/10/2021   22:40:02   (   0.01,-137.16) (  -0.43,-139.08)  218.88                80
 06/11/2021   22:23:58   (   0.01,-137.15) (   0.61,-134.56)  296.04                80
 06/13/2021   10:45:46   (  -0.01,-137.13) (   0.60,-139.82)  306.85                80
 06/14/2021   10:24:22   (  -0.00,-137.11) (  -0.39,-135.29)  207.62                80