Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 12 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/29/2019   10:17:55   (  -0.04,-128.25) (   0.91,-132.40)  473.68                80
 12/30/2019   10:01:39   (  -0.04,-128.27) (  -0.11,-127.82)   50.31                80
 01/01/2020   22:01:43   (   0.04,-128.29) (  -0.03,-128.48)   23.09                80
 01/04/2020   10:04:20   (  -0.05,-128.36) (   0.10,-129.12)   86.36                80
 01/05/2020   09:48:05   (  -0.04,-128.38) (  -0.92,-124.55)  437.09                80
 01/06/2020   22:07:04   (   0.05,-128.37) (  -0.25,-129.78)  160.52                80
 01/07/2020   21:50:48   (   0.04,-128.38) (   0.78,-125.21)  362.31                80
 01/09/2020   10:09:40   (  -0.04,-128.42) (   0.38,-130.41)  226.29                80
 01/10/2020   09:53:23   (  -0.03,-128.42) (  -0.60,-125.82)  296.20                80