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

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/16/2021   22:09:59   (  -0.06,-128.14) (  -0.02,-127.93)   23.73                80
 05/19/2021   10:12:30   (   0.07,-128.27) (   0.11,-128.53)   29.67                80
 05/20/2021   09:50:53   (   0.07,-128.28) (  -0.94,-123.94)  495.41                80
 05/21/2021   22:12:28   (  -0.07,-128.24) (  -0.28,-129.14)  102.71                80
 05/22/2021   21:56:11   (  -0.07,-128.26) (   0.76,-124.56)  422.54                80
 05/24/2021   10:17:38   (   0.07,-128.36) (   0.41,-129.73)  156.67                80
 05/25/2021   09:56:00   (   0.07,-128.38) (  -0.64,-125.15)  367.64                80
 05/26/2021   22:17:37   (  -0.07,-128.32) (  -0.52,-130.36)  232.67                80
 05/27/2021   22:01:19   (  -0.06,-128.33) (   0.53,-125.77)  291.69                80
 05/29/2021   10:22:46   (   0.07,-128.42) (   0.62,-130.95)  287.95                80