Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 1 7.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/07/2020   21:50:48   (   0.04,-128.37) (   0.75,-125.20)  361.62                80
 01/09/2020   10:09:39   (  -0.05,-128.41) (   0.39,-130.40)  227.06                80
 01/10/2020   09:53:24   (  -0.04,-128.41) (  -0.64,-125.83)  295.35                80
 01/11/2020   22:12:23   (   0.04,-128.39) (  -0.54,-131.06)  303.37                80
 01/12/2020   21:56:08   (   0.04,-128.40) (   0.49,-126.48)  218.52                80
 01/14/2020   10:14:58   (  -0.05,-128.42) (   0.71,-131.68)  371.45                80
 01/15/2020   09:58:42   (  -0.04,-128.42) (  -0.32,-127.10)  150.37                80
 01/16/2020   22:17:43   (   0.05,-128.40) (  -0.81,-132.35)  448.78                80
 01/17/2020   22:01:26   (   0.05,-128.40) (   0.17,-127.76)   72.76                80
 01/20/2020   10:04:02   (  -0.04,-128.42) (  -0.07,-128.39)    4.36                80