Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 9 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/22/2019   22:13:38   (  -0.32,-127.86) (  -1.10,-131.32)  394.60                80
 09/23/2019   21:57:23   (  -0.32,-127.83) (  -0.10,-126.74)  122.94                80
 09/25/2019   10:16:14   (   0.30,-127.80) (   1.26,-131.95)  474.01                80
 09/26/2019   09:57:18   (   0.31,-127.76) (   0.25,-127.37)   43.07                80
 09/28/2019   22:00:04   (  -0.30,-127.63) (  -0.38,-128.05)   47.02                80
 09/29/2019   21:43:49   (  -0.31,-127.59) (   0.62,-123.47)  470.24                80
 10/01/2019   10:02:40   (   0.29,-127.56) (   0.54,-128.67)  126.95                80
 10/02/2019   09:46:25   (   0.30,-127.52) (  -0.47,-124.10)  389.63                80
 10/03/2019   22:05:25   (  -0.28,-127.42) (  -0.72,-129.34)  218.94                80
 10/04/2019   21:49:09   (  -0.29,-127.37) (   0.29,-124.76)  297.70                80