Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 5 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/06/2019   22:02:04   (  -0.06,-128.22) (  -0.38,-129.57)  154.50                80
 05/07/2019   21:46:01   (  -0.06,-128.24) (   0.66,-125.05)  363.97                80
 05/09/2019   10:05:09   (   0.05,-128.27) (   0.53,-130.32)  234.63                80
 05/10/2019   09:49:05   (   0.06,-128.28) (  -0.51,-125.80)  283.28                80
 05/11/2019   22:08:23   (  -0.05,-128.30) (  -0.67,-131.11)  319.22                80
 05/12/2019   21:52:18   (  -0.06,-128.32) (   0.33,-126.57)  198.67                80
 05/14/2019   10:11:28   (   0.05,-128.34) (   0.81,-131.85)  400.31                80
 05/15/2019   09:55:23   (   0.05,-128.35) (  -0.18,-127.32)  117.25                80
 05/16/2019   22:14:40   (  -0.04,-128.36) (  -1.00,-132.63)  486.13                80
 05/17/2019   21:58:36   (  -0.04,-128.37) (  -0.00,-128.09)   31.43                80