Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 8 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/22/2019   22:03:14   (   0.35,-128.43) (   0.39,-128.26)   19.43                80
 08/25/2019   10:03:12   (  -0.36,-128.44) (  -0.29,-128.90)   51.55                80
 08/26/2019   09:46:56   (  -0.36,-128.43) (  -1.28,-124.32)  468.52                80
 08/27/2019   22:05:57   (   0.37,-128.38) (   0.13,-129.57)  134.63                80
 08/28/2019   21:49:41   (   0.37,-128.37) (   1.12,-124.99)  385.20                80
 08/30/2019   10:08:34   (  -0.38,-128.39) (   0.03,-130.20)  206.98                80
 08/31/2019   09:52:18   (  -0.38,-128.37) (  -0.97,-125.62)  312.58                80
 09/01/2019   22:11:18   (   0.38,-128.31) (  -0.19,-130.87)  291.32                80
 09/02/2019   21:55:03   (   0.38,-128.30) (   0.81,-126.29)  228.22                80
 09/04/2019   10:16:35   (  -0.39,-128.31) (   0.34,-131.50)  364.09                80