Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 5 12.  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   22:01:51   (   0.08,-128.30) (   0.10,-128.29)    2.44                80
 05/15/2020   10:07:05   (  -0.07,-128.31) (   0.06,-128.90)   67.14                80
 05/16/2020   09:45:29   (  -0.08,-128.30) (  -1.00,-124.33)  454.01                80
 05/17/2020   22:09:48   (   0.05,-128.29) (  -0.21,-129.55)  142.58                80
 05/18/2020   21:48:11   (   0.07,-128.29) (   0.79,-124.96)  378.89                80
 05/20/2020   10:12:22   (  -0.04,-128.30) (   0.36,-130.16)  211.92                80
 05/21/2020   09:50:45   (  -0.06,-128.29) (  -0.64,-125.58)  308.67                80
 05/22/2020   22:15:04   (   0.04,-128.26) (  -0.51,-130.81)  289.80                80
 05/23/2020   21:53:28   (   0.05,-128.25) (   0.49,-126.22)  230.84                80
 05/25/2020   10:17:37   (  -0.03,-128.25) (   0.71,-131.41)  360.71                80