Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 1 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/09/2020   10:09:39   (  -0.05,-128.41) (   0.38,-130.40)  227.12                80
 01/10/2020   09:53:24   (  -0.04,-128.41) (  -0.64,-125.83)  295.36                80
 01/11/2020   22:12:23   (   0.05,-128.40) (  -0.54,-131.06)  303.05                80
 01/12/2020   21:56:08   (   0.04,-128.40) (   0.49,-126.48)  218.90                80
 01/14/2020   10:14:59   (  -0.05,-128.43) (   0.65,-131.69)  371.16                80
 01/15/2020   09:58:43   (  -0.05,-128.43) (  -0.32,-127.10)  150.73                80
 01/16/2020   22:17:43   (   0.05,-128.41) (  -0.82,-132.34)  448.16                80
 01/17/2020   22:01:27   (   0.05,-128.41) (   0.21,-127.77)   73.43                80
 01/20/2020   10:04:02   (  -0.04,-128.42) (  -0.05,-128.39)    4.07                80
 01/22/2020   22:04:06   (   0.03,-128.39) (  -0.12,-129.04)   74.35                80