Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 10 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/17/2019   10:02:32   (   0.22,-128.15) (   0.19,-128.03)   14.05                80
 10/19/2019   22:02:37   (  -0.21,-128.16) (  -0.36,-128.69)   61.77                80
 10/20/2019   21:46:23   (  -0.22,-128.18) (   0.71,-124.13)  462.11                80
 10/22/2019   10:05:14   (   0.19,-128.26) (   0.45,-129.33)  122.49                80
 10/23/2019   09:48:58   (   0.20,-128.28) (  -0.56,-124.76)  400.83                80
 10/24/2019   22:08:00   (  -0.18,-128.25) (  -0.55,-130.01)  200.23                80
 10/25/2019   21:51:44   (  -0.19,-128.27) (   0.46,-125.43)  323.21                80
 10/27/2019   10:10:35   (   0.17,-128.35) (   0.71,-130.64)  261.60                80
 10/28/2019   09:54:21   (   0.18,-128.36) (  -0.36,-126.08)  261.50                80