Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 7 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)
 07/30/2019   22:08:56   (   0.26,-128.22) (  -0.40,-131.21)  341.35                80
 07/31/2019   21:52:51   (   0.25,-128.24) (   0.61,-126.68)  177.41                80
 08/02/2019   10:12:00   (  -0.28,-128.29) (   0.54,-131.96)  418.04                80
 08/03/2019   09:55:55   (  -0.27,-128.30) (  -0.47,-127.43)  100.43                80
 08/05/2019   21:59:08   (   0.28,-128.32) (   0.33,-128.21)   14.30                80
 08/08/2019   09:59:31   (  -0.29,-128.38) (  -0.13,-128.94)   63.63                80
 08/09/2019   09:43:26   (  -0.28,-128.40) (  -1.15,-124.40)  454.31                80
 08/10/2019   22:02:44   (   0.30,-128.39) (  -0.00,-129.72)  151.66                80
 08/11/2019   21:46:39   (   0.30,-128.40) (   1.01,-125.19)  366.06                80
 08/13/2019   10:05:47   (  -0.32,-128.44) (   0.14,-130.46)  230.44                80