Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 5 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/31/2019   09:55:32   (   0.02,-128.44) (  -0.21,-127.35)  124.44                80
 06/01/2019   22:14:49   (  -0.00,-128.44) (  -0.96,-132.66)  480.50                80
 06/02/2019   21:58:44   (  -0.01,-128.44) (   0.04,-128.12)   35.43                80
 06/05/2019   09:59:09   (  -0.00,-128.41) (   0.10,-128.87)   52.84                80
 06/06/2019   09:43:05   (   0.01,-128.39) (  -0.90,-124.34)  462.13                80
 06/07/2019   22:02:22   (   0.01,-128.37) (  -0.26,-129.65)  144.63                80
 06/08/2019   21:46:18   (  -0.00,-128.36) (   0.74,-125.11)  370.43                80
 06/10/2019   10:05:26   (  -0.02,-128.33) (   0.46,-130.38)  233.72                80
 06/11/2019   09:49:21   (  -0.01,-128.32) (  -0.54,-125.85)  280.93                80
 06/12/2019   22:08:39   (   0.03,-128.29) (  -0.61,-131.16)  326.93                80