Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 6 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/14/2020   22:08:02   (  -0.02,-127.71) (  -0.77,-131.01)  376.16                80
 06/15/2020   21:51:58   (  -0.01,-127.68) (   0.27,-126.48)  136.73                80
 06/17/2020   10:13:44   (   0.03,-127.64) (   0.97,-131.74)  466.98                80
 06/18/2020   09:52:19   (   0.01,-127.60) (  -0.07,-127.21)   45.01                80
 06/20/2020   21:55:30   (  -0.01,-127.48) (  -0.10,-127.98)   56.03                80
 06/21/2020   21:39:25   (  -0.01,-127.44) (   0.89,-123.44)  455.89                80
 06/23/2020   10:01:12   (   0.02,-127.39) (   0.29,-128.70)  149.19                80
 06/24/2020   09:39:47   (   0.01,-127.34) (  -0.69,-124.16)  361.89                80
 06/25/2020   22:01:42   (  -0.02,-127.24) (  -0.51,-129.46)  252.68                80
 06/26/2020   21:45:37   (  -0.02,-127.19) (   0.47,-124.92)  258.70                80