Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 9 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/21/2020   22:00:55   (   0.11,-128.31) (   0.27,-127.67)   72.34                80
 09/24/2020   10:06:08   (  -0.12,-128.38) (  -0.12,-128.28)   11.41                80
 09/26/2020   22:08:51   (   0.13,-128.37) (   0.03,-128.94)   63.52                80
 09/27/2020   21:47:15   (   0.13,-128.38) (   1.05,-124.36)  459.79                80
 09/29/2020   10:08:44   (  -0.13,-128.44) (   0.11,-129.54)  125.48                80
 09/30/2020   09:52:27   (  -0.13,-128.45) (  -0.92,-124.96)  397.98                80
 10/01/2020   22:14:06   (   0.13,-128.43) (  -0.26,-130.19)  199.89                80
 10/02/2020   21:52:29   (   0.13,-128.44) (   0.77,-125.61)  323.12                80
 10/04/2020   10:13:59   (  -0.13,-128.49) (   0.39,-130.80)  263.06                80