Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-A
TLE Epoch: 2018 1 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)
 01/22/2018   06:08:38   (   0.00,-134.83) (   0.77,-131.29)  402.49                80
 01/23/2018   18:30:09   (   0.01,-134.88) (   0.23,-135.86)  112.23                80
 01/24/2018   18:09:28   (   0.00,-134.92) (  -0.89,-130.87)  461.16                80
 01/26/2018   06:28:27   (  -0.00,-134.99) (  -0.12,-135.47)   54.81                80
 01/28/2018   18:23:56   (   0.00,-135.05) (  -0.01,-135.04)    1.12                80
 01/31/2018   06:22:14   (  -0.01,-135.14) (   0.13,-134.65)   56.62                80
 02/01/2018   18:41:03   (   0.03,-135.16) (   0.93,-139.20)  461.00                80
 02/02/2018   18:23:03   (   0.03,-135.19) (  -0.19,-134.21)  111.17                80
 02/04/2018   06:42:01   (  -0.03,-135.25) (  -0.81,-138.81)  405.77                80