Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 7 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)
 07/12/2020   10:08:16   (   0.03,-128.35) (   0.15,-129.01)   74.07                80
 07/13/2020   09:46:39   (   0.03,-128.37) (  -0.86,-124.43)  449.07                80
 07/14/2020   22:08:18   (  -0.03,-128.33) (  -0.33,-129.65)  150.47                80
 07/15/2020   21:52:02   (  -0.02,-128.34) (   0.74,-125.08)  372.46                80
 07/17/2020   10:13:32   (   0.02,-128.40) (   0.41,-130.28)  212.63                80
 07/18/2020   09:51:56   (   0.01,-128.41) (  -0.60,-125.69)  309.50                80
 07/19/2020   22:13:34   (   0.00,-128.36) (  -0.57,-130.92)  291.97                80
 07/20/2020   21:57:18   (   0.01,-128.36) (   0.44,-126.33)  230.00                80
 07/22/2020   10:18:49   (  -0.02,-128.41) (   0.66,-131.54)  356.06                80
 07/23/2020   09:57:13   (  -0.02,-128.41) (  -0.35,-126.96)  165.61                80
 07/24/2020   22:18:51   (   0.02,-128.35) (  -0.82,-132.19)  436.67                80