Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 6 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/15/2020   21:51:57   (  -0.01,-127.68) (   0.25,-126.48)  136.86                80
 06/17/2020   10:13:45   (   0.03,-127.64) (   0.94,-131.74)  467.01                80
 06/18/2020   09:52:19   (   0.02,-127.60) (  -0.05,-127.20)   45.06                80
 06/20/2020   21:55:30   (  -0.02,-127.48) (  -0.12,-127.97)   55.88                80
 06/21/2020   21:39:25   (  -0.01,-127.44) (   0.92,-123.44)  455.92                80
 06/23/2020   10:01:12   (   0.02,-127.39) (   0.32,-128.70)  149.36                80
 06/24/2020   09:39:47   (   0.01,-127.34) (  -0.72,-124.17)  361.71                80
 06/25/2020   22:01:43   (  -0.02,-127.24) (  -0.49,-129.46)  252.77                80
 06/26/2020   21:45:37   (  -0.02,-127.19) (   0.49,-124.92)  258.60                80
 06/28/2020   10:07:24   (   0.03,-127.14) (   0.69,-130.19)  346.66                80
 06/29/2020   09:45:59   (   0.02,-127.09) (  -0.30,-125.65)  164.03                80