Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 9 7.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/07/2019   22:00:14   (  -0.36,-128.25) (  -0.15,-127.44)   93.32                80
 09/10/2019   10:00:10   (   0.36,-128.23) (   0.34,-128.06)   18.54                80
 09/12/2019   22:02:55   (  -0.35,-128.14) (  -0.46,-128.74)   67.43                80
 09/13/2019   21:46:40   (  -0.35,-128.12) (   0.54,-124.16)  451.55                80
 09/15/2019   10:08:11   (   0.34,-128.12) (   0.64,-129.36)  142.15                80
 09/16/2019   09:46:37   (   0.35,-128.09) (  -0.42,-124.80)  376.26                80
 09/17/2019   22:08:17   (  -0.34,-128.02) (  -0.76,-130.04)  229.66                80
 09/18/2019   21:52:02   (  -0.34,-127.99) (   0.24,-125.46)  288.76                80
 09/20/2019   10:10:53   (   0.33,-127.99) (   0.93,-130.66)  305.46                80