Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 5 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/06/2020   22:18:10   (   0.09,-128.28) (  -0.64,-131.60)  378.32                80
 05/07/2020   21:56:35   (   0.11,-128.29) (   0.42,-127.03)  144.21                80
 05/09/2020   10:20:44   (  -0.08,-128.31) (   0.81,-132.21)  444.96                80
 05/10/2020   09:59:08   (  -0.10,-128.31) (  -0.25,-127.64)   76.75                80
 05/12/2020   22:04:30   (   0.08,-128.31) (   0.06,-128.28)    3.95                80
 05/15/2020   10:07:05   (  -0.07,-128.33) (   0.04,-128.91)   64.95                80
 05/16/2020   09:45:29   (  -0.08,-128.33) (  -0.96,-124.32)  456.58                80
 05/17/2020   22:09:47   (   0.05,-128.31) (  -0.23,-129.54)  140.47                80
 05/18/2020   21:48:11   (   0.07,-128.32) (   0.83,-124.97)  381.28                80