Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 4 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/27/2019   22:14:24   (  -0.06,-127.99) (  -0.81,-131.39)  386.89                80
 04/28/2019   21:58:09   (  -0.07,-128.02) (   0.22,-126.82)  137.38                80
 04/30/2019   10:19:42   (   0.06,-128.06) (   0.95,-132.03)  452.47                80
 05/01/2019   09:58:07   (   0.07,-128.08) (  -0.08,-127.46)   71.36                80
 05/03/2019   22:03:34   (  -0.06,-128.15) (  -0.03,-128.14)    3.66                80
 05/06/2019   10:06:12   (   0.05,-128.20) (   0.16,-128.78)   65.59                80
 05/07/2019   09:44:36   (   0.06,-128.22) (  -0.81,-124.20)  457.27                80
 05/08/2019   22:06:18   (  -0.05,-128.25) (  -0.34,-129.45)  137.83                80
 05/09/2019   21:50:03   (  -0.06,-128.26) (   0.70,-124.89)  384.80                80