Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 1 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/23/2020   21:45:10   (   0.03,-128.41) (   0.93,-124.46)  449.67                80
 01/25/2020   10:06:41   (  -0.04,-128.39) (   0.24,-129.66)  144.31                80
 01/26/2020   09:50:25   (  -0.04,-128.38) (  -0.79,-125.08)  376.49                80
 01/27/2020   22:12:05   (   0.04,-128.38) (  -0.41,-130.31)  221.27                80
 01/28/2020   21:50:29   (   0.04,-128.37) (   0.62,-125.74)  299.25                80
 01/30/2020   10:11:59   (  -0.04,-128.34) (   0.55,-130.93)  295.33                80
 01/31/2020   09:55:44   (  -0.04,-128.33) (  -0.49,-126.36)  225.15                80
 02/01/2020   22:17:23   (   0.04,-128.32) (  -0.71,-131.59)  372.92                80
 02/02/2020   21:55:48   (   0.03,-128.30) (   0.33,-127.02)  147.05                80
 02/04/2020   10:17:18   (  -0.03,-128.27) (   0.84,-132.21)  448.88                80
 02/05/2020   10:01:02   (  -0.03,-128.25) (  -0.14,-127.62)   70.82                80