Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 12 29.  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) (   0.88,-132.41)  473.69                80
 12/30/2019   10:01:40   (  -0.04,-128.27) (  -0.15,-127.83)   50.18                80
 01/01/2020   22:01:44   (   0.04,-128.29) (  -0.00,-128.49)   23.09                80
 01/04/2020   10:04:20   (  -0.05,-128.36) (   0.14,-129.11)   86.68                80
 01/05/2020   09:48:04   (  -0.04,-128.37) (  -0.89,-124.54)  436.69                80
 01/06/2020   22:07:03   (   0.05,-128.36) (  -0.29,-129.77)  161.02                80
 01/07/2020   21:50:48   (   0.04,-128.37) (   0.74,-125.20)  361.73                80
 01/09/2020   10:09:39   (  -0.04,-128.41) (   0.42,-130.40)  226.90                80
 01/10/2020   09:53:24   (  -0.03,-128.42) (  -0.61,-125.82)  295.51                80
 01/11/2020   22:15:03   (   0.04,-128.40) (  -0.58,-131.06)  303.32                80