Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 1 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/22/2020   22:06:46   (   0.04,-128.42) (  -0.10,-129.04)   71.08                80
 01/23/2020   21:45:11   (   0.03,-128.41) (   0.93,-124.47)  449.85                80
 01/25/2020   10:06:41   (  -0.04,-128.40) (   0.24,-129.66)  143.86                80
 01/26/2020   09:50:25   (  -0.03,-128.39) (  -0.79,-125.09)  377.05                80
 01/27/2020   22:12:05   (   0.04,-128.38) (  -0.41,-130.31)  220.68                80
 01/28/2020   21:50:29   (   0.04,-128.37) (   0.63,-125.74)  299.95                80
 01/30/2020   10:11:59   (  -0.04,-128.35) (   0.54,-130.94)  294.35                80
 01/31/2020   09:55:44   (  -0.04,-128.34) (  -0.49,-126.36)  226.23                80
 02/01/2020   22:17:23   (   0.04,-128.33) (  -0.70,-131.59)  371.81                80
 02/02/2020   21:55:48   (   0.03,-128.32) (   0.33,-127.02)  148.27                80