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

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/01/2020   22:01:43   (   0.05,-128.28) (  -0.01,-128.48)   23.26                80
 01/04/2020   10:04:19   (  -0.05,-128.35) (   0.14,-129.11)   86.96                80
 01/05/2020   09:48:04   (  -0.04,-128.37) (  -0.89,-124.54)  436.35                80
 01/06/2020   22:07:03   (   0.05,-128.36) (  -0.29,-129.77)  161.51                80
 01/07/2020   21:50:48   (   0.04,-128.37) (   0.74,-125.19)  361.18                80
 01/09/2020   10:09:39   (  -0.04,-128.40) (   0.41,-130.40)  227.46                80
 01/10/2020   09:53:24   (  -0.04,-128.41) (  -0.62,-125.82)  294.87                80
 01/11/2020   22:12:23   (   0.04,-128.39) (  -0.56,-131.06)  304.13                80
 01/12/2020   21:56:07   (   0.04,-128.39) (   0.47,-126.48)  217.62                80
 01/14/2020   10:14:59   (  -0.04,-128.42) (   0.68,-131.69)  372.43                80