Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 8 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/30/2020   22:20:24   (   0.07,-127.69) (  -0.86,-131.78)  466.29                80
 08/31/2020   21:58:48   (   0.07,-127.73) (   0.16,-127.20)   59.86                80
 09/03/2020   10:04:03   (  -0.08,-127.89) (  -0.10,-127.83)    7.26                80
 09/05/2020   22:06:45   (   0.08,-127.91) (  -0.03,-128.47)   63.59                80
 09/06/2020   21:45:08   (   0.08,-127.95) (   0.99,-123.89)  462.11                80
 09/08/2020   10:06:38   (  -0.08,-128.06) (   0.15,-129.09)  117.48                80
 09/09/2020   09:50:22   (  -0.08,-128.09) (  -0.87,-124.51)  407.89                80
 09/10/2020   22:12:00   (   0.09,-128.07) (  -0.28,-129.74)  190.19                80
 09/11/2020   21:50:24   (   0.09,-128.09) (   0.75,-125.15)  334.52                80