Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 4 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/11/2020   21:49:03   (   0.23,-127.78) (   0.77,-125.27)  286.12                80
 04/13/2020   10:13:14   (  -0.20,-127.84) (   0.37,-130.47)  299.83                80
 04/14/2020   09:51:39   (  -0.22,-127.87) (  -0.68,-125.90)  224.91                80
 04/15/2020   22:15:56   (   0.19,-127.91) (  -0.56,-131.11)  365.70                80
 04/16/2020   21:54:21   (   0.20,-127.94) (   0.49,-126.54)  159.39                80
 04/18/2020   10:18:32   (  -0.17,-128.00) (   0.65,-131.74)  426.29                80
 04/19/2020   09:56:57   (  -0.18,-128.03) (  -0.40,-127.17)   98.25                80
 04/20/2020   22:21:14   (   0.16,-128.06) (  -0.83,-132.38)  493.28                80
 04/21/2020   21:59:38   (   0.17,-128.09) (   0.22,-127.81)   31.45                80
 04/24/2020   10:04:53   (  -0.16,-128.17) (  -0.07,-128.43)   30.54                80