Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 6 7.  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) (  -0.25,-129.65)  142.74                80
 06/08/2019   21:46:18   (  -0.00,-128.38) (   0.75,-125.11)  372.71                80
 06/10/2019   10:05:26   (  -0.02,-128.36) (   0.44,-130.38)  230.70                80
 06/11/2019   09:49:22   (  -0.01,-128.35) (  -0.56,-125.85)  284.34                80
 06/12/2019   22:08:39   (   0.03,-128.32) (  -0.60,-131.16)  323.09                80
 06/13/2019   21:52:34   (   0.02,-128.31) (   0.40,-126.63)  191.95                80
 06/15/2019   10:11:43   (  -0.05,-128.29) (   0.79,-131.90)  411.69                80
 06/16/2019   09:55:38   (  -0.04,-128.27) (  -0.21,-127.36)  102.84                80
 06/18/2019   21:58:51   (   0.05,-128.22) (   0.06,-128.14)    8.48                80
 06/21/2019   09:59:15   (  -0.06,-128.17) (   0.12,-128.88)   81.23                80