Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 7 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/09/2020   22:03:02   (  -0.03,-128.27) (  -0.03,-128.40)   14.45                80
 07/12/2020   10:08:16   (   0.03,-128.36) (   0.16,-129.01)   74.08                80
 07/13/2020   09:46:39   (   0.03,-128.37) (  -0.85,-124.43)  449.04                80
 07/14/2020   22:08:18   (  -0.03,-128.33) (  -0.34,-129.65)  150.76                80
 07/15/2020   21:52:02   (  -0.02,-128.34) (   0.73,-125.08)  372.21                80
 07/17/2020   10:13:32   (   0.02,-128.41) (   0.42,-130.28)  212.48                80
 07/18/2020   09:51:56   (   0.01,-128.41) (  -0.59,-125.69)  309.67                80
 07/19/2020   22:13:34   (   0.00,-128.36) (  -0.58,-130.92)  292.06                80
 07/20/2020   21:57:19   (   0.01,-128.36) (   0.48,-126.35)  229.94                80
 07/22/2020   10:18:49   (  -0.01,-128.42) (   0.68,-131.54)  355.74                80
 07/23/2020   09:57:13   (  -0.02,-128.42) (  -0.33,-126.96)  165.95                80