Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2017 12 18.  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)
 12/18/2017   18:31:49   (  -0.11,-135.37) (  -0.15,-135.10)   29.78                80
 12/20/2017   06:50:51   (   0.09,-135.41) (  -0.85,-139.71)  489.46                80
 12/21/2017   06:27:31   (   0.10,-135.40) (   0.25,-134.71)   78.09                80
 12/22/2017   18:46:22   (  -0.08,-135.32) (   0.78,-139.27)  449.31                80
 12/23/2017   18:28:23   (  -0.09,-135.31) (  -0.32,-134.27)  118.38                80
 12/25/2017   06:47:23   (   0.07,-135.34) (  -0.74,-138.86)  401.43                80
 12/26/2017   06:24:05   (   0.08,-135.33) (   0.43,-133.88)  165.50                80
 12/27/2017   18:42:55   (  -0.07,-135.24) (   0.66,-138.42)  363.48                80
 12/28/2017   18:24:56   (  -0.08,-135.22) (  -0.44,-133.43)  203.37                80
 12/30/2017   06:43:57   (   0.07,-135.24) (  -0.55,-138.03)  317.57                80
 12/31/2017   06:20:37   (   0.07,-135.22) (   0.56,-133.04)  248.33                80