Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 8 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/09/2020   22:15:40   (   0.01,-128.20) (  -0.68,-131.36)  360.21                80
 08/10/2020   21:59:24   (   0.01,-128.17) (   0.33,-126.78)  159.05                80
 08/12/2020   10:18:14   (  -0.02,-128.17) (   0.83,-131.97)  432.86                80
 08/13/2020   10:01:58   (  -0.02,-128.14) (  -0.18,-127.39)   85.79                80
 08/15/2020   22:01:58   (   0.02,-128.01) (  -0.00,-128.02)    2.75                80
 08/18/2020   10:04:32   (  -0.02,-127.96) (   0.15,-128.63)   77.26                80
 08/19/2020   09:48:16   (  -0.02,-127.92) (  -0.87,-124.05)  440.60                80
 08/20/2020   22:07:13   (   0.02,-127.81) (  -0.33,-129.27)  166.71                80
 08/21/2020   21:50:57   (   0.02,-127.77) (   0.69,-124.69)  351.10                80