Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 1 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/20/2020   10:04:02   (  -0.05,-128.43) (  -0.04,-128.38)    5.64                80
 01/22/2020   22:06:47   (   0.04,-128.42) (  -0.07,-129.05)   71.04                80
 01/23/2020   21:45:10   (   0.03,-128.41) (   0.90,-124.46)  450.04                80
 01/25/2020   10:06:41   (  -0.03,-128.40) (   0.22,-129.67)  143.35                80
 01/26/2020   09:50:25   (  -0.03,-128.40) (  -0.75,-125.08)  377.67                80
 01/27/2020   22:12:05   (   0.04,-128.39) (  -0.39,-130.32)  220.22                80
 01/28/2020   21:50:30   (   0.04,-128.38) (   0.64,-125.75)  300.48                80
 01/30/2020   10:12:00   (  -0.04,-128.36) (   0.53,-130.94)  293.48                80
 01/31/2020   09:55:45   (  -0.04,-128.36) (  -0.50,-126.37)  227.17                80
 02/01/2020   22:17:24   (   0.04,-128.34) (  -0.70,-131.59)  371.05                80