Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 11 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/10/2021   22:29:30   (  -0.09,-128.45) (  -0.86,-131.97)  400.92                80
 11/11/2021   22:13:11   (  -0.10,-128.44) (   0.17,-127.37)  122.78                80
 11/13/2021   10:31:58   (   0.07,-128.44) (   0.96,-132.54)  466.75                80
 11/14/2021   10:15:38   (   0.08,-128.44) (  -0.01,-127.94)   56.94                80
 11/16/2021   22:15:35   (  -0.07,-128.43) (  -0.12,-128.55)   14.60                80
 11/19/2021   10:18:03   (   0.06,-128.42) (   0.22,-129.13)   81.14                80
 11/20/2021   10:01:44   (   0.08,-128.41) (  -0.81,-124.54)  441.85                80
 11/21/2021   22:20:40   (  -0.05,-128.38) (  -0.33,-129.74)  154.42                80
 11/22/2021   22:04:20   (  -0.06,-128.37) (   0.65,-125.14)  368.25                80