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

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/11/2021   22:01:36   (  -0.28,-128.04) (   0.47,-124.79)  371.54                80
 10/13/2021   10:20:22   (   0.25,-128.11) (   0.69,-129.96)  211.84                80
 10/14/2021   10:04:05   (   0.26,-128.13) (  -0.39,-125.38)  314.63                80
 10/15/2021   22:23:00   (  -0.23,-128.15) (  -0.80,-130.58)  277.81                80
 10/16/2021   22:06:43   (  -0.24,-128.17) (   0.27,-126.00)  248.76                80
 10/18/2021   10:25:29   (   0.21,-128.24) (   0.88,-131.17)  334.53                80
 10/19/2021   10:09:10   (   0.23,-128.26) (  -0.14,-126.57)  192.02                80
 10/20/2021   22:28:07   (  -0.20,-128.28) (  -0.99,-131.79)  400.55                80
 10/21/2021   22:11:48   (  -0.21,-128.30) (   0.03,-127.19)  125.73                80
 10/23/2021   10:30:36   (   0.18,-128.35) (   1.07,-132.38)  458.36                80
 10/24/2021   10:14:17   (   0.20,-128.37) (   0.05,-127.78)   67.54                80