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) (  -0.04,-127.93)   23.79                80
 05/19/2021   10:12:29   (   0.07,-128.26) (   0.15,-128.52)   29.69                80
 05/20/2021   09:50:51   (   0.07,-128.28) (  -0.90,-123.93)  495.53                80
 05/21/2021   22:12:27   (  -0.07,-128.24) (  -0.29,-129.14)  102.44                80
 05/22/2021   21:56:09   (  -0.07,-128.26) (   0.78,-124.55)  422.93                80
 05/24/2021   10:17:36   (   0.07,-128.36) (   0.36,-129.73)  156.05                80
 05/25/2021   09:55:58   (   0.07,-128.37) (  -0.66,-125.14)  368.39                80
 05/26/2021   22:17:33   (  -0.06,-128.31) (  -0.51,-130.35)  231.61                80
 05/27/2021   22:01:15   (  -0.06,-128.32) (   0.51,-125.75)  292.94                80