Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 5 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/18/2019   22:17:06   (  -0.03,-128.41) (  -0.86,-132.09)  419.53                80
 05/19/2019   22:00:52   (  -0.04,-128.42) (   0.18,-127.52)  102.65                80
 05/21/2019   10:19:44   (   0.02,-128.43) (   0.96,-132.74)  489.98                80
 05/22/2019   10:03:29   (   0.03,-128.44) (  -0.02,-128.16)   31.73                80
 05/24/2019   22:03:36   (  -0.03,-128.45) (  -0.10,-128.84)   43.80                80
 05/25/2019   21:47:20   (  -0.04,-128.46) (   0.88,-124.26)  477.99                80
 05/27/2019   10:06:12   (   0.02,-128.46) (   0.25,-129.47)  115.05                80
 05/28/2019   09:49:58   (   0.03,-128.46) (  -0.79,-124.91)  406.29                80
 05/29/2019   22:08:59   (  -0.02,-128.46) (  -0.37,-130.15)  192.07                80
 05/30/2019   21:52:44   (  -0.02,-128.46) (   0.61,-125.57)  329.22                80