Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 5 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/22/2021   21:56:12   (  -0.07,-128.28) (   0.79,-124.57)  423.62                80
 05/24/2021   10:17:39   (   0.07,-128.38) (   0.39,-129.74)  155.58                80
 05/25/2021   09:56:01   (   0.07,-128.39) (  -0.65,-125.15)  368.94                80
 05/26/2021   22:17:38   (  -0.07,-128.34) (  -0.51,-130.37)  230.69                80
 05/27/2021   22:01:20   (  -0.07,-128.35) (   0.53,-125.78)  293.95                80
 05/29/2021   10:22:48   (   0.07,-128.45) (   0.65,-130.95)  285.68                80
 05/30/2021   10:01:10   (   0.07,-128.46) (  -0.40,-126.37)  238.31                80
 05/31/2021   22:22:46   (  -0.07,-128.39) (  -0.77,-131.58)  362.74                80
 06/01/2021   22:06:29   (  -0.07,-128.40) (   0.27,-126.99)  161.78                80
 06/03/2021   10:27:56   (   0.07,-128.51) (   0.89,-132.17)  417.15                80
 06/04/2021   10:06:19   (   0.08,-128.51) (  -0.15,-127.58)  106.87                80