Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 6 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)
 06/07/2019   22:02:22   (   0.01,-128.39) (  -0.28,-129.64)  142.76                80
 06/08/2019   21:46:17   (  -0.00,-128.38) (   0.72,-125.11)  372.64                80
 06/10/2019   10:05:26   (  -0.02,-128.36) (   0.41,-130.39)  230.88                80
 06/11/2019   09:49:22   (  -0.01,-128.34) (  -0.58,-125.86)  284.14                80
 06/12/2019   22:08:38   (   0.03,-128.32) (  -0.63,-131.15)  323.30                80
 06/13/2019   21:52:34   (   0.02,-128.31) (   0.37,-126.62)  191.74                80
 06/15/2019   10:11:43   (  -0.05,-128.29) (   0.76,-131.90)  412.02                80
 06/16/2019   09:55:39   (  -0.04,-128.27) (  -0.24,-127.37)  102.41                80
 06/18/2019   21:58:51   (   0.05,-128.21) (   0.09,-128.15)    8.50                80