Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 6 3.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/03/2021   10:27:57   (   0.06,-128.50) (   0.86,-132.17)  418.21                80
 06/04/2021   10:06:19   (   0.06,-128.50) (  -0.13,-127.57)  105.56                80
 06/05/2021   22:27:55   (  -0.06,-128.44) (  -1.06,-132.78)  495.84                80
 06/06/2021   22:11:37   (  -0.06,-128.44) (  -0.02,-128.19)   28.07                80
 06/09/2021   10:14:07   (   0.05,-128.53) (   0.13,-128.78)   29.72                80
 06/10/2021   09:52:30   (   0.06,-128.53) (  -0.91,-124.20)  493.20                80
 06/11/2021   22:14:06   (  -0.05,-128.44) (  -0.27,-129.41)  110.02                80
 06/12/2021   21:57:49   (  -0.05,-128.44) (   0.77,-124.82)  412.93                80
 06/14/2021   10:19:16   (   0.04,-128.52) (   0.38,-130.00)  168.95                80
 06/15/2021   09:57:38   (   0.05,-128.51) (  -0.66,-125.41)  353.42                80
 06/16/2021   22:19:15   (  -0.05,-128.41) (  -0.52,-130.62)  251.30                80