Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 6 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/23/2019   09:57:59   (  -0.07,-128.10) (  -0.32,-126.87)  140.18                80
 06/24/2019   22:17:00   (   0.09,-128.06) (  -0.83,-132.12)  462.46                80
 06/25/2019   22:00:46   (   0.08,-128.03) (   0.21,-127.55)   56.01                80
 06/28/2019   10:00:43   (  -0.09,-127.96) (  -0.06,-128.18)   25.10                80
 06/29/2019   09:44:27   (  -0.08,-127.92) (  -1.04,-123.60)  492.39                80
 06/30/2019   22:03:28   (   0.11,-127.87) (  -0.10,-128.85)  111.98                80
 07/01/2019   21:47:13   (   0.10,-127.83) (   0.89,-124.27)  405.31                80
 07/03/2019   10:06:05   (  -0.13,-127.78) (   0.26,-129.48)  194.91                80
 07/04/2019   09:49:50   (  -0.11,-127.73) (  -0.72,-124.91)  321.63                80
 07/05/2019   22:08:51   (   0.14,-127.66) (  -0.41,-130.16)  284.58                80
 07/06/2019   21:52:36   (   0.13,-127.62) (   0.58,-125.58)  232.19                80