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

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/05/2021   22:15:58   (  -0.06,-127.80) (  -0.58,-130.09)  260.28                80
 05/06/2021   21:59:40   (  -0.06,-127.84) (   0.45,-125.50)  267.00                80
 05/08/2021   10:21:09   (   0.06,-127.96) (   0.70,-130.68)  311.09                80
 05/09/2021   09:59:32   (   0.05,-127.99) (  -0.39,-126.11)  215.31                80
 05/10/2021   22:21:07   (  -0.06,-127.98) (  -0.82,-131.31)  379.10                80
 05/11/2021   22:04:50   (  -0.05,-128.02) (   0.22,-126.72)  147.60                80
 05/13/2021   10:26:18   (   0.05,-128.13) (   0.92,-131.90)  430.58                80
 05/14/2021   10:04:41   (   0.05,-128.15) (  -0.11,-127.31)   95.10                80
 05/16/2021   22:10:00   (  -0.05,-128.16) (   0.00,-127.94)   24.41                80
 05/19/2021   10:12:30   (   0.05,-128.28) (   0.10,-128.54)   28.73                80