Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 6 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/28/2019   10:00:42   (  -0.09,-127.96) (  -0.02,-128.17)   24.64                80
 06/29/2019   09:44:27   (  -0.08,-127.93) (  -1.07,-123.61)  493.01                80
 06/30/2019   22:03:28   (   0.11,-127.88) (  -0.14,-128.84)  110.75                80
 07/01/2019   21:47:13   (   0.10,-127.84) (   0.91,-124.28)  406.69                80
 07/03/2019   10:06:05   (  -0.12,-127.78) (   0.23,-129.49)  193.86                80
 07/04/2019   09:49:50   (  -0.11,-127.74) (  -0.75,-124.91)  322.82                80
 07/05/2019   22:08:50   (   0.14,-127.67) (  -0.44,-130.15)  282.67                80
 07/06/2019   21:52:36   (   0.13,-127.63) (   0.61,-125.58)  234.24                80
 07/08/2019   10:11:28   (  -0.15,-127.57) (   0.55,-130.79)  366.30                80
 07/09/2019   09:55:13   (  -0.14,-127.53) (  -0.44,-126.21)  150.09                80
 07/10/2019   22:14:13   (   0.16,-127.45) (  -0.74,-131.45)  456.46                80
 07/11/2019   21:57:57   (   0.16,-127.41) (   0.25,-126.88)   60.06                80