Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 5 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/06/2019   10:06:12   (   0.06,-128.21) (   0.16,-128.78)   64.72                80
 05/07/2019   09:44:37   (   0.06,-128.23) (  -0.82,-124.20)  458.39                80
 05/08/2019   22:06:18   (  -0.05,-128.26) (  -0.34,-129.45)  136.38                80
 05/09/2019   21:50:03   (  -0.06,-128.28) (   0.69,-124.88)  386.43                80
 05/11/2019   10:08:56   (   0.05,-128.30) (   0.47,-130.09)  205.31                80
 05/12/2019   09:52:41   (   0.06,-128.31) (  -0.57,-125.53)  317.10                80
 05/13/2019   22:11:43   (  -0.05,-128.33) (  -0.60,-130.77)  278.82                80
 05/14/2019   21:55:28   (  -0.05,-128.34) (   0.44,-126.21)  243.62                80
 05/16/2019   10:14:20   (   0.04,-128.36) (   0.72,-131.42)  348.34                80
 05/17/2019   09:58:06   (   0.05,-128.37) (  -0.32,-126.85)  173.69                80
 05/18/2019   22:17:07   (  -0.03,-128.38) (  -0.85,-132.10)  423.38                80
 05/19/2019   22:00:53   (  -0.03,-128.39) (   0.19,-127.53)   98.55                80