Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 9 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/23/2019   21:57:22   (  -0.32,-127.83) (  -0.10,-126.74)  123.17                80
 09/25/2019   10:16:14   (   0.30,-127.80) (   1.26,-131.95)  473.82                80
 09/26/2019   09:59:59   (   0.31,-127.76) (   0.20,-127.38)   43.30                80
 09/28/2019   22:00:04   (  -0.30,-127.64) (  -0.38,-128.05)   46.45                80
 09/29/2019   21:43:49   (  -0.31,-127.60) (   0.62,-123.47)  470.87                80
 10/01/2019   10:02:40   (   0.29,-127.56) (   0.54,-128.67)  126.36                80
 10/02/2019   09:46:24   (   0.30,-127.52) (  -0.47,-124.10)  390.29                80
 10/03/2019   22:05:25   (  -0.28,-127.42) (  -0.72,-129.34)  218.03                80
 10/04/2019   21:49:09   (  -0.29,-127.38) (   0.29,-124.76)  298.68                80
 10/06/2019   10:08:01   (   0.27,-127.35) (   0.87,-129.96)  298.82                80