Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-A
TLE Epoch: 2017 9 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  METOP-A Lat/Lon    Distance(km)  Time Diff(sec)
 09/22/2017   06:37:59   (   0.26,-135.34) (  -0.14,-137.25)  216.71                80
 09/23/2017   06:17:19   (   0.24,-135.35) (   0.96,-132.25)  353.94                80
 09/24/2017   18:33:29   (  -0.26,-135.43) (   0.08,-136.81)  157.86                80
 09/25/2017   18:15:29   (  -0.24,-135.44) (  -1.03,-131.81)  413.04                80
 09/27/2017   06:34:28   (   0.26,-135.39) (   0.05,-136.41)  115.96                80
 09/28/2017   06:11:08   (   0.24,-135.39) (   1.15,-131.41)  453.86                80
 09/29/2017   18:29:58   (  -0.26,-135.45) (  -0.12,-135.97)   59.77                80
 10/02/2017   06:30:57   (   0.26,-135.41) (   0.24,-135.58)   19.09                80
 10/04/2017   18:29:07   (  -0.27,-135.45) (  -0.32,-135.14)   34.71                80