Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 5 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/28/2021   10:45:36   (  -0.01,-137.19) (   0.59,-139.79)  297.06                80
 05/29/2021   10:24:12   (  -0.01,-137.18) (  -0.44,-135.27)  218.16                80
 05/30/2021   22:46:10   (   0.00,-137.17) (  -0.75,-140.57)  387.99                80
 05/31/2021   22:30:05   (   0.01,-137.16) (   0.23,-136.04)  127.33                80
 06/02/2021   10:51:54   (  -0.00,-137.15) (   0.92,-141.31)  474.64                80
 06/03/2021   10:30:30   (  -0.00,-137.14) (  -0.07,-136.78)   40.48                80
 06/05/2021   22:33:44   (   0.00,-137.11) (  -0.08,-137.56)   51.34                80
 06/06/2021   22:17:39   (   0.01,-137.10) (   0.91,-133.03)  463.47                80
 06/08/2021   10:39:29   (  -0.01,-137.08) (   0.25,-138.30)  139.61                80
 06/09/2021   10:18:04   (  -0.01,-137.06) (  -0.74,-133.77)  374.62                80