Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2017 12 10.  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)
 12/11/2017   06:37:04   (   0.13,-135.43) (  -0.08,-136.38)  108.04                80
 12/12/2017   06:13:44   (   0.13,-135.43) (   1.02,-131.38)  460.99                80
 12/13/2017   18:32:35   (  -0.12,-135.40) (   0.01,-135.94)   62.14                80
 12/16/2017   06:33:37   (   0.12,-135.44) (   0.07,-135.54)   12.10                80
 12/18/2017   18:31:49   (  -0.11,-135.39) (  -0.14,-135.10)   31.89                80
 12/20/2017   06:50:50   (   0.09,-135.43) (  -0.87,-139.70)  487.34                80
 12/21/2017   06:27:31   (   0.10,-135.42) (   0.23,-134.71)   80.56                80
 12/22/2017   18:46:22   (  -0.08,-135.35) (   0.80,-139.26)  445.99                80
 12/23/2017   18:28:23   (  -0.09,-135.34) (  -0.30,-134.27)  122.09                80