Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 3 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 03/28/2021   09:56:14   (  -0.06,-128.35) (  -0.70,-125.61)  313.61                80
 03/29/2021   22:17:50   (   0.05,-128.35) (  -0.49,-130.82)  280.43                80
 03/30/2021   22:01:32   (   0.06,-128.34) (   0.54,-126.23)  241.33                80
 04/01/2021   10:23:01   (  -0.05,-128.32) (   0.63,-131.41)  351.69                80
 04/02/2021   10:01:23   (  -0.05,-128.30) (  -0.40,-126.82)  168.84                80
 04/03/2021   22:22:59   (   0.04,-128.27) (  -0.78,-132.03)  427.54                80
 04/04/2021   22:06:42   (   0.04,-128.26) (   0.25,-127.44)   93.56                80
 04/06/2021   10:28:09   (  -0.03,-128.23) (   0.98,-132.61)  499.19                80
 04/07/2021   10:06:33   (  -0.03,-128.21) (  -0.10,-128.03)   21.24                80
 04/09/2021   22:09:11   (   0.03,-128.16) (  -0.09,-128.65)   55.68                80
 04/10/2021   21:52:53   (   0.04,-128.14) (   0.94,-124.06)  465.25                80