Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 5 31.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/02/2020   22:33:40   (  -0.00,-137.18) (  -0.06,-137.54)   40.72                80
 06/03/2020   22:17:35   (   0.00,-137.17) (   0.92,-133.00)  474.94                80
 06/05/2020   10:39:22   (  -0.00,-137.16) (   0.27,-138.26)  126.84                80
 06/06/2020   10:17:57   (  -0.01,-137.14) (  -0.77,-133.74)  388.32                80
 06/07/2020   22:39:53   (   0.01,-137.12) (  -0.45,-139.03)  218.48                80
 06/08/2020   22:23:48   (   0.00,-137.10) (   0.59,-134.50)  296.55                80
 06/10/2020   10:45:36   (  -0.00,-137.08) (   0.60,-139.77)  305.88                80
 06/11/2020   10:24:11   (  -0.00,-137.07) (  -0.44,-135.24)  208.94                80
 06/12/2020   22:46:06   (  -0.00,-137.03) (  -0.77,-140.53)  398.47                80
 06/13/2020   22:30:01   (  -0.00,-137.02) (   0.21,-135.99)  116.22                80