Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 5 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/10/2020   09:59:09   (  -0.10,-128.31) (  -0.26,-127.64)   76.05                80
 05/12/2020   22:01:51   (   0.08,-128.30) (   0.11,-128.29)    3.51                80
 05/15/2020   10:07:05   (  -0.07,-128.32) (   0.05,-128.90)   66.49                80
 05/16/2020   09:45:29   (  -0.08,-128.31) (  -0.95,-124.32)  454.83                80
 05/17/2020   22:09:48   (   0.05,-128.30) (  -0.20,-129.55)  141.95                80
 05/18/2020   21:48:12   (   0.07,-128.30) (   0.80,-124.97)  379.66                80
 05/20/2020   10:12:22   (  -0.04,-128.31) (   0.36,-130.16)  210.56                80
 05/21/2020   09:50:45   (  -0.06,-128.31) (  -0.64,-125.58)  310.18                80
 05/22/2020   22:15:05   (   0.04,-128.28) (  -0.51,-130.81)  288.45                80
 05/23/2020   21:53:28   (   0.05,-128.27) (   0.49,-126.23)  232.31                80