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)
 12/30/2019   10:01:40   (  -0.04,-128.27) (  -0.12,-127.82)   50.20                80
 01/01/2020   22:01:43   (   0.04,-128.28) (  -0.03,-128.48)   23.39                80
 01/04/2020   10:04:20   (  -0.05,-128.36) (   0.11,-129.12)   86.85                80
 01/05/2020   09:48:05   (  -0.04,-128.37) (  -0.92,-124.55)  436.49                80
 01/06/2020   22:07:04   (   0.05,-128.36) (  -0.26,-129.78)  161.28                80
 01/07/2020   21:50:49   (   0.04,-128.37) (   0.77,-125.20)  361.42                80
 01/09/2020   10:09:40   (  -0.04,-128.41) (   0.39,-130.41)  227.23                80
 01/10/2020   09:53:24   (  -0.03,-128.42) (  -0.64,-125.83)  295.14                80
 01/11/2020   22:15:04   (   0.04,-128.40) (  -0.55,-131.06)  303.77                80
 01/12/2020   21:56:08   (   0.03,-128.40) (   0.48,-126.49)  217.99                80