Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 6 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/22/2019   10:14:14   (  -0.08,-128.13) (   0.67,-131.44)  378.14                80
 06/23/2019   09:58:00   (  -0.07,-128.10) (  -0.37,-126.88)  140.15                80
 06/24/2019   22:17:00   (   0.09,-128.06) (  -0.85,-132.11)  462.71                80
 06/25/2019   22:00:46   (   0.08,-128.03) (   0.20,-127.55)   55.71                80
 06/28/2019   10:00:42   (  -0.09,-127.96) (  -0.04,-128.18)   25.11                80
 06/29/2019   09:44:27   (  -0.08,-127.92) (  -1.02,-123.60)  492.30                80
 06/30/2019   22:03:28   (   0.11,-127.87) (  -0.12,-128.85)  112.28                80
 07/01/2019   21:47:14   (   0.10,-127.83) (   0.92,-124.28)  405.02                80
 07/03/2019   10:06:06   (  -0.13,-127.78) (   0.23,-129.49)  195.08                80
 07/04/2019   09:49:51   (  -0.11,-127.73) (  -0.75,-124.91)  321.46                80
 07/05/2019   22:08:51   (   0.14,-127.66) (  -0.44,-130.15)  284.95                80