Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 6 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/13/2020   09:46:07   (   0.01,-127.78) (  -0.47,-125.72)  234.79                80
 06/14/2020   22:08:03   (  -0.02,-127.71) (  -0.74,-131.02)  376.22                80
 06/15/2020   21:51:57   (  -0.01,-127.68) (   0.24,-126.48)  136.70                80
 06/17/2020   10:13:44   (   0.03,-127.65) (   0.94,-131.74)  466.87                80
 06/18/2020   09:52:20   (   0.01,-127.61) (  -0.10,-127.22)   45.21                80
 06/20/2020   21:55:30   (  -0.01,-127.48) (  -0.13,-127.97)   55.88                80
 06/21/2020   21:39:25   (  -0.01,-127.44) (   0.91,-123.44)  455.98                80
 06/23/2020   10:01:12   (   0.02,-127.39) (   0.33,-128.70)  148.98                80
 06/24/2020   09:39:47   (   0.01,-127.34) (  -0.71,-124.17)  362.12                80
 06/25/2020   22:01:42   (  -0.02,-127.24) (  -0.49,-129.46)  252.56                80