Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 5 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/12/2020   22:04:30   (   0.08,-128.30) (   0.06,-128.28)    3.56                80
 05/15/2020   10:07:05   (  -0.07,-128.31) (   0.04,-128.90)   66.86                80
 05/16/2020   09:45:29   (  -0.08,-128.31) (  -0.96,-124.32)  454.42                80
 05/17/2020   22:09:47   (   0.05,-128.30) (  -0.25,-129.54)  142.27                80
 05/18/2020   21:48:12   (   0.07,-128.30) (   0.81,-124.97)  379.28                80
 05/20/2020   10:12:22   (  -0.04,-128.31) (   0.34,-130.16)  211.19                80
 05/21/2020   09:50:45   (  -0.06,-128.30) (  -0.65,-125.58)  309.49                80
 05/22/2020   22:15:04   (   0.04,-128.27) (  -0.55,-130.80)  289.06                80
 05/23/2020   21:53:28   (   0.05,-128.26) (   0.50,-126.23)  231.64                80