Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 6 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)
 06/07/2019   10:00:45   (  -0.01,-128.39) (  -0.19,-127.52)   99.47                80
 06/09/2019   22:03:31   (   0.02,-128.36) (   0.05,-128.20)   19.27                80
 06/12/2019   10:03:28   (  -0.02,-128.33) (   0.09,-128.83)   57.00                80
 06/13/2019   09:47:14   (  -0.01,-128.32) (  -0.95,-124.26)  462.43                80
 06/14/2019   22:06:15   (   0.04,-128.29) (  -0.22,-129.51)  138.73                80
 06/15/2019   21:50:00   (   0.03,-128.27) (   0.76,-124.93)  380.67                80
 06/17/2019   10:08:52   (  -0.05,-128.25) (   0.37,-130.14)  216.08                80
 06/18/2019   09:52:37   (  -0.04,-128.23) (  -0.66,-125.58)  302.82                80
 06/19/2019   22:11:39   (   0.07,-128.19) (  -0.49,-130.83)  299.61                80