Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 3 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)
 03/22/2021   10:12:41   (  -0.08,-128.40) (   0.04,-128.98)   66.21                80
 03/23/2021   09:51:03   (  -0.09,-128.39) (  -0.98,-124.39)  455.37                80
 03/24/2021   22:12:40   (   0.07,-128.39) (  -0.22,-129.60)  138.24                80
 03/25/2021   21:56:23   (   0.08,-128.38) (   0.86,-125.02)  383.81                80
 03/27/2021   10:17:51   (  -0.06,-128.36) (   0.36,-130.19)  208.82                80
 03/28/2021   09:56:14   (  -0.07,-128.35) (  -0.71,-125.61)  312.22                80
 03/29/2021   22:17:49   (   0.06,-128.33) (  -0.53,-130.81)  283.25                80
 03/30/2021   22:01:33   (   0.07,-128.32) (   0.55,-126.23)  238.17                80
 04/01/2021   10:23:01   (  -0.05,-128.30) (   0.62,-131.41)  354.63                80
 04/02/2021   10:01:24   (  -0.06,-128.27) (  -0.40,-126.82)  165.58                80
 04/03/2021   22:22:59   (   0.05,-128.24) (  -0.83,-132.02)  432.10                80