Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 3 27.  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   10:17:50   (  -0.05,-128.37) (   0.35,-130.19)  207.69                80
 03/28/2021   09:56:13   (  -0.07,-128.35) (  -0.66,-125.60)  313.64                80
 03/29/2021   22:17:49   (   0.05,-128.35) (  -0.52,-130.81)  280.53                80
 03/30/2021   22:01:33   (   0.06,-128.34) (   0.56,-126.23)  241.23                80
 04/01/2021   10:23:00   (  -0.05,-128.32) (   0.66,-131.40)  351.76                80
 04/02/2021   10:01:23   (  -0.06,-128.30) (  -0.36,-126.81)  168.77                80
 04/03/2021   22:22:59   (   0.04,-128.27) (  -0.81,-132.02)  427.75                80
 04/04/2021   22:06:41   (   0.04,-128.26) (   0.21,-127.44)   93.30                80
 04/06/2021   10:28:10   (  -0.03,-128.23) (   0.96,-132.61)  499.41                80
 04/07/2021   10:06:32   (  -0.03,-128.21) (  -0.06,-128.03)   20.86                80
 04/09/2021   22:09:11   (   0.03,-128.16) (  -0.07,-128.65)   56.06                80