Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 6 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/10/2020   21:45:45   (   0.00,-127.85) (   0.65,-124.99)  325.44                80
 06/12/2020   10:07:32   (   0.01,-127.82) (   0.53,-130.26)  277.79                80
 06/13/2020   09:46:07   (   0.00,-127.78) (  -0.45,-125.72)  234.93                80
 06/14/2020   22:08:02   (  -0.02,-127.71) (  -0.77,-131.01)  376.19                80
 06/15/2020   21:51:58   (  -0.01,-127.68) (   0.27,-126.49)  136.81                80
 06/17/2020   10:13:44   (   0.03,-127.65) (   0.97,-131.74)  466.41                80
 06/18/2020   09:52:20   (   0.01,-127.61) (  -0.07,-127.21)   45.67                80
 06/20/2020   21:55:30   (  -0.01,-127.49) (  -0.10,-127.98)   55.47                80
 06/21/2020   21:39:25   (  -0.01,-127.44) (   0.89,-123.44)  456.54                80
 06/23/2020   10:01:12   (   0.02,-127.40) (   0.29,-128.70)  148.04                80
 06/24/2020   09:39:47   (   0.01,-127.35) (  -0.69,-124.16)  363.12                80