Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 3 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 03/27/2021   10:17:51   (  -0.06,-128.37) (   0.34,-130.19)  207.73                80
 03/28/2021   09:56:13   (  -0.07,-128.35) (  -0.68,-125.60)  313.51                80
 03/29/2021   22:17:50   (   0.05,-128.35) (  -0.50,-130.81)  281.12                80
 03/30/2021   22:01:32   (   0.06,-128.34) (   0.52,-126.22)  240.52                80
 04/01/2021   10:23:00   (  -0.05,-128.31) (   0.64,-131.40)  352.28                80
 04/02/2021   10:01:23   (  -0.06,-128.29) (  -0.38,-126.82)  168.14                80
 04/03/2021   22:22:59   (   0.04,-128.26) (  -0.79,-132.03)  428.80                80
 04/04/2021   22:06:42   (   0.05,-128.25) (   0.23,-127.44)   92.14                80
 04/07/2021   10:06:33   (  -0.04,-128.20) (  -0.08,-128.03)   19.74                80