Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 12 30.  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   22:04:24   (   0.05,-128.28) (   0.02,-128.49)   23.43                80
 01/04/2020   10:04:20   (  -0.05,-128.35) (   0.11,-129.12)   86.93                80
 01/05/2020   09:48:05   (  -0.04,-128.37) (  -0.92,-124.55)  436.37                80
 01/06/2020   22:07:04   (   0.05,-128.36) (  -0.26,-129.78)  161.46                80
 01/07/2020   21:50:48   (   0.04,-128.37) (   0.76,-125.20)  361.23                80
 01/09/2020   10:09:40   (  -0.04,-128.41) (   0.39,-130.41)  227.42                80
 01/10/2020   09:53:24   (  -0.03,-128.41) (  -0.64,-125.83)  294.94                80
 01/11/2020   22:15:03   (   0.04,-128.39) (  -0.54,-131.06)  304.05                80
 01/12/2020   21:56:08   (   0.03,-128.39) (   0.48,-126.49)  217.71                80