Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 3 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 03/16/2021   10:26:28   (  -0.10,-128.40) (   0.79,-132.35)  450.09                80
 03/17/2021   10:04:50   (  -0.11,-128.40) (  -0.22,-127.76)   72.52                80
 03/19/2021   22:10:10   (   0.10,-128.42) (   0.09,-128.39)    3.93                80
 03/22/2021   10:12:41   (  -0.09,-128.40) (   0.04,-128.98)   66.56                80
 03/23/2021   09:51:03   (  -0.09,-128.39) (  -0.98,-124.39)  455.06                80
 03/24/2021   22:12:40   (   0.08,-128.39) (  -0.22,-129.60)  138.27                80
 03/25/2021   21:56:23   (   0.08,-128.39) (   0.86,-125.03)  383.81                80
 03/27/2021   10:17:51   (  -0.07,-128.36) (   0.36,-130.19)  209.10                80
 03/28/2021   09:56:14   (  -0.08,-128.35) (  -0.72,-125.62)  311.99                80