Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 5 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/29/2019   22:08:59   (  -0.02,-128.45) (  -0.40,-130.14)  192.99                80
 05/30/2019   21:52:45   (  -0.02,-128.45) (   0.64,-125.58)  328.06                80
 06/01/2019   10:11:36   (   0.01,-128.44) (   0.54,-130.78)  267.30                80
 06/02/2019   09:55:21   (   0.01,-128.43) (  -0.50,-126.21)  253.00                80
 06/03/2019   22:14:23   (   0.01,-128.42) (  -0.67,-131.46)  346.23                80
 06/04/2019   21:58:07   (   0.00,-128.41) (   0.31,-126.88)  173.87                80
 06/06/2019   10:17:00   (  -0.02,-128.39) (   0.81,-132.10)  422.47                80
 06/07/2019   10:00:44   (  -0.01,-128.37) (  -0.18,-127.52)   97.02                80
 06/09/2019   22:03:31   (   0.02,-128.33) (   0.06,-128.20)   15.84                80