Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 10 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/04/2019   21:49:11   (  -0.29,-127.67) (   0.38,-124.78)  330.31                80
 10/06/2019   10:08:02   (   0.27,-127.79) (   0.77,-129.98)  250.03                80
 10/07/2019   09:51:48   (   0.27,-127.83) (  -0.29,-125.42)  275.41                80
 10/08/2019   22:10:48   (  -0.25,-127.82) (  -0.90,-130.65)  323.18                80
 10/09/2019   21:54:34   (  -0.26,-127.86) (   0.17,-126.09)  202.35                80
 10/11/2019   10:13:25   (   0.23,-127.98) (   0.99,-131.30)  378.09                80
 10/12/2019   09:57:10   (   0.24,-128.02) (  -0.02,-126.72)  147.18                80
 10/13/2019   22:16:11   (  -0.22,-128.00) (  -1.11,-131.97)  452.13                80
 10/14/2019   21:59:55   (  -0.23,-128.04) (  -0.10,-127.39)   73.00                80
 10/17/2019   10:02:32   (   0.22,-128.18) (   0.19,-128.04)   16.40                80