Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 5 7.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/07/2020   21:56:34   (   0.11,-128.29) (   0.36,-127.02)  144.23                80
 05/09/2020   10:20:44   (  -0.08,-128.31) (   0.80,-132.21)  445.06                80
 05/10/2020   09:59:08   (  -0.10,-128.31) (  -0.26,-127.64)   76.63                80
 05/12/2020   22:04:30   (   0.08,-128.31) (   0.06,-128.28)    3.70                80
 05/15/2020   10:07:05   (  -0.07,-128.33) (   0.04,-128.91)   65.14                80
 05/16/2020   09:45:29   (  -0.08,-128.33) (  -0.97,-124.32)  456.40                80
 05/17/2020   22:09:47   (   0.05,-128.31) (  -0.23,-129.54)  140.58                80
 05/18/2020   21:48:11   (   0.07,-128.31) (   0.83,-124.97)  381.16                80
 05/20/2020   10:12:21   (  -0.05,-128.33) (   0.38,-130.16)  208.31                80