Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 11 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/08/2021   10:26:52   (   0.11,-128.46) (   0.77,-131.34)  329.37                80
 11/09/2021   10:10:34   (   0.12,-128.46) (  -0.26,-126.75)  194.36                80
 11/10/2021   22:29:30   (  -0.09,-128.45) (  -0.85,-131.97)  400.57                80
 11/11/2021   22:13:10   (  -0.10,-128.44) (   0.13,-127.36)  123.22                80
 11/13/2021   10:31:57   (   0.07,-128.45) (   0.99,-132.54)  466.03                80
 11/14/2021   10:15:38   (   0.08,-128.45) (  -0.05,-127.94)   57.82                80
 11/16/2021   22:15:34   (  -0.07,-128.43) (  -0.10,-128.55)   13.17                80
 11/19/2021   10:18:01   (   0.06,-128.42) (   0.21,-129.12)   79.27                80
 11/20/2021   10:01:41   (   0.08,-128.41) (  -0.79,-124.52)  443.96                80
 11/21/2021   22:20:37   (  -0.05,-128.39) (  -0.32,-129.73)  151.95                80