Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 6 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/24/2019   22:17:00   (   0.09,-128.06) (  -0.82,-132.12)  462.32                80
 06/25/2019   22:00:45   (   0.08,-128.04) (   0.17,-127.54)   56.13                80
 06/28/2019   10:00:42   (  -0.09,-127.96) (  -0.02,-128.17)   25.02                80
 06/29/2019   09:44:27   (  -0.08,-127.92) (  -1.07,-123.61)  492.53                80
 06/30/2019   22:03:28   (   0.11,-127.87) (  -0.13,-128.84)  111.76                80
 07/01/2019   21:47:13   (   0.10,-127.83) (   0.91,-124.28)  405.58                80
 07/03/2019   10:06:05   (  -0.13,-127.78) (   0.23,-129.49)  194.71                80
 07/04/2019   09:49:50   (  -0.11,-127.73) (  -0.75,-124.91)  321.87                80
 07/05/2019   22:08:50   (   0.14,-127.66) (  -0.43,-130.15)  284.20                80
 07/06/2019   21:52:35   (   0.13,-127.62) (   0.56,-125.57)  232.61                80