Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 12 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/25/2019   09:56:20   (  -0.03,-128.16) (  -0.41,-126.54)  185.19                80
 12/26/2019   22:15:19   (   0.04,-128.17) (  -0.76,-131.78)  411.15                80
 12/27/2019   21:59:04   (   0.03,-128.19) (   0.27,-127.20)  112.94                80
 12/29/2019   10:17:55   (  -0.04,-128.25) (   0.90,-132.40)  473.20                80
 12/30/2019   10:01:40   (  -0.04,-128.28) (  -0.13,-127.83)   50.89                80
 01/01/2020   22:01:43   (   0.04,-128.30) (  -0.01,-128.49)   21.86                80
 01/04/2020   10:04:19   (  -0.05,-128.38) (   0.15,-129.11)   84.90                80
 01/05/2020   09:48:04   (  -0.04,-128.39) (  -0.88,-124.54)  438.73                80
 01/06/2020   22:07:03   (   0.04,-128.39) (  -0.29,-129.77)  158.61                80
 01/07/2020   21:50:48   (   0.04,-128.40) (   0.74,-125.20)  364.38                80