Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-A
TLE Epoch: 2018 12 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)
 12/22/2018   05:49:44   (   0.14,-128.61) (   0.12,-128.61)    3.13                80
 12/24/2018   17:47:50   (  -0.13,-128.59) (  -0.22,-128.18)   46.26                80
 12/26/2018   06:06:46   (   0.12,-128.59) (  -0.81,-132.78)  477.07                80
 12/27/2018   05:43:24   (   0.12,-128.57) (   0.27,-127.77)   90.55                80
 12/28/2018   18:02:12   (  -0.11,-128.54) (   0.71,-132.34)  432.87                80
 12/29/2018   17:44:10   (  -0.11,-128.53) (  -0.38,-127.34)  135.60                80
 12/31/2018   06:03:06   (   0.10,-128.54) (  -0.64,-131.94)  387.18                80
 01/01/2019   05:39:44   (   0.11,-128.52) (   0.44,-126.94)  180.06                80
 01/02/2019   17:58:31   (  -0.10,-128.47) (   0.60,-131.49)  344.95                80
 01/03/2019   17:40:29   (  -0.10,-128.46) (  -0.54,-126.50)  223.03                80