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

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/15/2020   09:58:43   (  -0.05,-128.43) (  -0.32,-127.10)  151.29                80
 01/16/2020   22:17:43   (   0.05,-128.43) (  -0.82,-132.34)  446.10                80
 01/17/2020   22:01:27   (   0.05,-128.43) (   0.21,-127.77)   75.72                80
 01/20/2020   10:04:02   (  -0.04,-128.44) (  -0.05,-128.38)    5.95                80
 01/22/2020   22:04:06   (   0.04,-128.42) (  -0.12,-129.04)   70.84                80
 01/23/2020   21:47:51   (   0.03,-128.42) (   0.91,-124.46)  450.34                80
 01/25/2020   10:06:42   (  -0.03,-128.42) (   0.22,-129.67)  142.09                80
 01/26/2020   09:50:25   (  -0.03,-128.41) (  -0.75,-125.08)  379.02                80
 01/27/2020   22:12:06   (   0.04,-128.40) (  -0.40,-130.32)  219.57                80
 01/28/2020   21:50:30   (   0.03,-128.39) (   0.63,-125.75)  301.24                80