Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 3 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 03/22/2021   10:12:41   (  -0.08,-128.40) (   0.06,-128.97)   66.12                80
 03/23/2021   09:51:03   (  -0.09,-128.39) (  -0.96,-124.38)  455.50                80
 03/24/2021   22:12:40   (   0.07,-128.39) (  -0.18,-129.61)  138.05                80
 03/25/2021   21:56:23   (   0.08,-128.38) (   0.84,-125.02)  384.03                80
 03/27/2021   10:17:51   (  -0.06,-128.36) (   0.32,-130.20)  208.58                80
 03/28/2021   09:56:14   (  -0.07,-128.35) (  -0.70,-125.61)  312.49                80
 03/29/2021   22:17:50   (   0.06,-128.33) (  -0.49,-130.82)  282.88                80
 03/30/2021   22:01:33   (   0.07,-128.32) (   0.53,-126.23)  238.54                80
 04/01/2021   10:23:01   (  -0.05,-128.30) (   0.64,-131.41)  354.21                80
 04/02/2021   10:01:23   (  -0.06,-128.28) (  -0.38,-126.82)  166.02                80
 04/03/2021   22:23:00   (   0.04,-128.24) (  -0.79,-132.03)  431.61                80
 04/04/2021   22:06:42   (   0.05,-128.22) (   0.23,-127.44)   89.10                80