Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 5 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/16/2019   10:14:20   (   0.05,-128.38) (   0.72,-131.41)  345.58                80
 05/17/2019   09:58:05   (   0.05,-128.39) (  -0.32,-126.84)  176.65                80
 05/18/2019   22:17:07   (  -0.03,-128.41) (  -0.86,-132.09)  419.66                80
 05/19/2019   22:00:52   (  -0.04,-128.42) (   0.18,-127.52)  102.52                80
 05/21/2019   10:19:44   (   0.02,-128.43) (   0.96,-132.74)  489.90                80
 05/22/2019   10:01:24   (   0.03,-128.44) (  -0.02,-128.16)   31.86                45
 05/24/2019   22:03:36   (  -0.03,-128.45) (  -0.13,-128.83)   43.89                80
 05/25/2019   21:47:21   (  -0.04,-128.46) (   0.91,-124.27)  477.89                80
 05/27/2019   10:06:14   (   0.02,-128.47) (   0.23,-129.48)  115.01                80
 05/28/2019   09:49:58   (   0.03,-128.47) (  -0.75,-124.90)  406.34                80
 05/29/2019   22:09:00   (  -0.02,-128.47) (  -0.37,-130.16)  192.21                80