Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 1 18.  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) (  -0.08,-128.39)    6.03                80
 01/22/2020   22:06:46   (   0.04,-128.42) (  -0.09,-129.04)   70.85                80
 01/23/2020   21:47:51   (   0.03,-128.41) (   0.94,-124.47)  450.24                80
 01/25/2020   10:06:41   (  -0.03,-128.41) (   0.23,-129.66)  142.90                80
 01/26/2020   09:50:26   (  -0.03,-128.40) (  -0.80,-125.09)  378.14                80
 01/27/2020   22:12:05   (   0.04,-128.39) (  -0.40,-130.32)  219.85                80
 01/28/2020   21:50:29   (   0.04,-128.38) (   0.63,-125.74)  300.91                80
 01/30/2020   10:12:00   (  -0.04,-128.37) (   0.54,-130.94)  292.81                80
 01/31/2020   09:55:44   (  -0.04,-128.36) (  -0.49,-126.36)  227.88                80