Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2017 12 13.  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)
 12/13/2017   18:32:36   (  -0.12,-135.40) (  -0.01,-135.94)   61.73                80
 12/16/2017   06:33:38   (   0.12,-135.45) (   0.10,-135.55)   11.34                80
 12/18/2017   18:31:49   (  -0.11,-135.39) (  -0.17,-135.11)   32.50                80
 12/20/2017   06:50:51   (   0.09,-135.44) (  -0.84,-139.71)  486.41                80
 12/21/2017   06:27:31   (   0.10,-135.43) (   0.26,-134.71)   81.52                80
 12/22/2017   18:46:23   (  -0.09,-135.36) (   0.77,-139.27)  444.93                80
 12/23/2017   18:28:23   (  -0.09,-135.35) (  -0.33,-134.27)  123.22                80
 12/25/2017   06:47:23   (   0.08,-135.39) (  -0.73,-138.86)  396.22                80
 12/26/2017   06:24:05   (   0.08,-135.38) (   0.43,-133.88)  171.09                80