Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2017 12 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  METOP-B Lat/Lon    Distance(km)  Time Diff(sec)
 12/21/2017   06:27:31   (   0.10,-135.40) (   0.26,-134.71)   78.08                80
 12/22/2017   18:46:22   (  -0.08,-135.32) (   0.82,-139.26)  449.32                80
 12/23/2017   18:28:23   (  -0.09,-135.31) (  -0.34,-134.28)  118.39                80
 12/25/2017   06:47:23   (   0.07,-135.34) (  -0.72,-138.87)  401.48                80
 12/26/2017   06:24:04   (   0.08,-135.33) (   0.38,-133.87)  165.43                80
 12/27/2017   18:42:55   (  -0.07,-135.24) (   0.64,-138.43)  363.52                80
 12/28/2017   18:24:56   (  -0.08,-135.22) (  -0.46,-133.43)  203.30                80
 12/30/2017   06:43:57   (   0.06,-135.24) (  -0.53,-138.04)  317.69                80
 12/31/2017   06:20:38   (   0.07,-135.21) (   0.57,-133.04)  248.21                80
 01/01/2018   18:39:28   (  -0.06,-135.11) (   0.52,-137.58)  282.76                80
 01/02/2018   18:21:29   (  -0.06,-135.08) (  -0.65,-132.60)  283.12                80