Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 10 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/13/2019   22:16:11   (  -0.22,-127.99) (  -1.09,-131.97)  452.83                80
 10/14/2019   21:59:56   (  -0.23,-128.02) (  -0.09,-127.39)   72.14                80
 10/17/2019   10:02:32   (   0.22,-128.15) (   0.17,-128.04)   14.32                80
 10/19/2019   22:02:37   (  -0.21,-128.15) (  -0.34,-128.70)   62.24                80
 10/20/2019   21:46:22   (  -0.22,-128.17) (   0.67,-124.12)  461.51                80
 10/22/2019   10:05:14   (   0.19,-128.26) (   0.42,-129.34)  122.76                80
 10/23/2019   09:48:59   (   0.20,-128.28) (  -0.58,-124.76)  400.52                80
 10/24/2019   22:07:59   (  -0.18,-128.24) (  -0.58,-130.00)  200.96                80
 10/25/2019   21:51:43   (  -0.19,-128.26) (   0.43,-125.43)  322.43                80