Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-A
TLE Epoch: 2017 12 22.  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)
 12/23/2017   06:32:39   (   0.09,-135.37) (  -0.15,-136.32)  109.06                80
 12/24/2017   06:09:18   (   0.09,-135.35) (   0.97,-131.33)  458.24                80
 12/25/2017   18:28:08   (  -0.08,-135.28) (   0.03,-135.89)   69.93                80
 12/26/2017   18:10:08   (  -0.08,-135.26) (  -1.08,-130.90)  497.46                80
 12/28/2017   06:29:06   (   0.07,-135.29) (   0.05,-135.49)   23.33                80
 12/30/2017   18:27:15   (  -0.07,-135.17) (  -0.10,-135.05)   13.07                80
 01/02/2018   06:22:53   (   0.06,-135.15) (   0.19,-134.65)   57.45                80
 01/03/2018   18:41:42   (  -0.05,-135.04) (   0.87,-139.21)  474.42                80
 01/04/2018   18:23:42   (  -0.05,-135.01) (  -0.25,-134.21)   91.39                80