Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 5 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/15/2020   10:07:05   (  -0.07,-128.31) (   0.06,-128.90)   67.30                80
 05/16/2020   09:45:28   (  -0.08,-128.30) (  -0.94,-124.31)  453.81                80
 05/17/2020   22:09:48   (   0.05,-128.29) (  -0.20,-129.55)  142.76                80
 05/18/2020   21:48:11   (   0.07,-128.29) (   0.80,-124.96)  378.66                80
 05/20/2020   10:12:22   (  -0.04,-128.29) (   0.35,-130.16)  212.36                80
 05/21/2020   09:50:45   (  -0.06,-128.28) (  -0.65,-125.58)  308.18                80
 05/22/2020   22:15:03   (   0.04,-128.26) (  -0.56,-130.80)  290.25                80
 05/23/2020   21:53:28   (   0.05,-128.25) (   0.50,-126.22)  230.33                80
 05/25/2020   10:17:37   (  -0.03,-128.24) (   0.70,-131.41)  361.42                80
 05/26/2020   09:56:02   (  -0.04,-128.23) (  -0.36,-126.84)  158.22                80