Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 5 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/29/2021   10:22:48   (   0.06,-128.45) (   0.63,-130.95)  285.76                80
 05/30/2021   10:01:10   (   0.06,-128.46) (  -0.41,-126.37)  238.23                80
 05/31/2021   22:22:47   (  -0.06,-128.40) (  -0.77,-131.58)  362.11                80
 06/01/2021   22:06:29   (  -0.07,-128.41) (   0.27,-126.99)  162.45                80
 06/03/2021   10:27:57   (   0.06,-128.51) (   0.90,-132.17)  417.15                80
 06/04/2021   10:06:19   (   0.07,-128.52) (  -0.14,-127.58)  106.84                80
 06/05/2021   22:27:55   (  -0.06,-128.45) (  -1.04,-132.79)  494.70                80
 06/06/2021   22:11:38   (  -0.07,-128.46) (  -0.00,-128.20)   29.44                80
 06/09/2021   10:14:08   (   0.06,-128.56) (   0.12,-128.79)   26.98                80
 06/10/2021   09:52:30   (   0.06,-128.55) (  -0.92,-124.20)  496.13                80
 06/11/2021   22:14:07   (  -0.05,-128.47) (  -0.27,-129.41)  107.26                80