Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 7 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/13/2019   10:16:52   (  -0.18,-127.74) (   0.78,-132.11)  498.04                80
 07/14/2019   10:00:36   (  -0.17,-127.77) (  -0.21,-127.53)   27.13                80
 07/16/2019   22:00:42   (   0.19,-127.83) (   0.09,-128.21)   43.72                80
 07/17/2019   21:44:28   (   0.18,-127.86) (   1.14,-123.64)  481.42                80
 07/19/2019   10:03:21   (  -0.20,-127.95) (  -0.03,-128.86)  103.42                80
 07/20/2019   09:47:05   (  -0.19,-127.98) (  -1.01,-124.28)  421.41                80
 07/21/2019   22:06:06   (   0.21,-127.99) (  -0.14,-129.53)  175.12                80
 07/22/2019   21:49:51   (   0.20,-128.03) (   0.91,-124.96)  349.71                80
 07/24/2019   10:08:45   (  -0.23,-128.11) (   0.21,-130.18)  235.40                80
 07/25/2019   09:52:29   (  -0.22,-128.14) (  -0.78,-125.60)  288.86                80
 07/26/2019   22:11:29   (   0.24,-128.14) (  -0.37,-130.85)  309.03                80