Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-A
TLE Epoch: 2017 12 23.  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)
 12/24/2017   06:09:18   (   0.09,-135.35) (   0.98,-131.33)  458.23                80
 12/25/2017   18:28:08   (  -0.08,-135.28) (   0.08,-135.88)   69.63                80
 12/26/2017   18:10:07   (  -0.08,-135.26) (  -1.03,-130.89)  497.81                80
 12/28/2017   06:29:06   (   0.07,-135.29) (   0.06,-135.50)   23.25                80
 12/30/2017   18:24:35   (  -0.07,-135.17) (  -0.11,-135.05)   13.68                80
 01/02/2018   06:22:53   (   0.06,-135.16) (   0.20,-134.66)   57.93                80
 01/03/2018   18:41:42   (  -0.05,-135.05) (   0.87,-139.21)  473.70                80
 01/04/2018   18:23:42   (  -0.05,-135.02) (  -0.25,-134.21)   92.16                80
 01/06/2018   06:42:40   (   0.04,-135.03) (  -0.77,-138.81)  429.60                80