Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 5 31.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/01/2019   10:11:36   (   0.01,-128.44) (   0.52,-130.78)  266.97                80
 06/02/2019   09:55:21   (   0.01,-128.43) (  -0.46,-126.20)  253.45                80
 06/03/2019   22:14:23   (   0.01,-128.43) (  -0.65,-131.46)  345.54                80
 06/04/2019   21:58:08   (   0.00,-128.42) (   0.33,-126.88)  174.64                80
 06/06/2019   10:17:00   (  -0.02,-128.40) (   0.80,-132.10)  421.66                80
 06/07/2019   10:00:45   (  -0.01,-128.38) (  -0.19,-127.52)   97.92                80
 06/09/2019   22:03:31   (   0.02,-128.35) (   0.06,-128.20)   17.09                80
 06/12/2019   10:03:28   (  -0.02,-128.31) (   0.09,-128.83)   60.09                80
 06/13/2019   09:47:13   (  -0.01,-128.29) (  -0.89,-124.25)  459.05                80