Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 8 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/10/2019   09:49:44   (  -0.29,-128.41) (  -1.08,-124.98)  392.34                80
 08/11/2019   22:08:43   (   0.31,-128.39) (  -0.12,-130.21)  207.39                80
 08/12/2019   21:52:29   (   0.31,-128.40) (   0.93,-125.64)  314.76                80
 08/14/2019   10:11:22   (  -0.33,-128.45) (   0.18,-130.86)  274.61                80
 08/15/2019   09:55:07   (  -0.32,-128.45) (  -0.81,-126.28)  247.24                80
 08/16/2019   22:14:07   (   0.34,-128.43) (  -0.34,-131.53)  353.16                80
 08/17/2019   21:57:52   (   0.33,-128.43) (   0.66,-126.95)  168.72                80
 08/19/2019   10:16:45   (  -0.35,-128.48) (   0.45,-132.17)  420.68                80
 08/20/2019   10:00:29   (  -0.34,-128.48) (  -0.54,-127.59)  100.78                80
 08/22/2019   22:03:14   (   0.35,-128.44) (   0.39,-128.26)   20.49                80