Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 7 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/08/2019   10:11:27   (  -0.15,-127.61) (   0.58,-130.78)  362.20                80
 07/09/2019   09:55:13   (  -0.14,-127.57) (  -0.46,-126.22)  154.68                80
 07/10/2019   22:14:13   (   0.16,-127.50) (  -0.72,-131.45)  451.19                80
 07/11/2019   21:57:58   (   0.16,-127.46) (   0.27,-126.88)   65.73                80
 07/14/2019   09:57:55   (  -0.17,-127.36) (  -0.15,-127.52)   18.07                80
 07/15/2019   09:41:40   (  -0.16,-127.31) (  -1.13,-122.94)  498.12                80
 07/16/2019   22:00:40   (   0.19,-127.23) (  -0.04,-128.18)  108.89                80
 07/17/2019   21:44:25   (   0.18,-127.18) (   0.95,-123.60)  407.48                80
 07/19/2019   10:03:18   (  -0.20,-127.13) (   0.16,-128.82)  193.00                80
 07/20/2019   09:47:03   (  -0.19,-127.08) (  -0.82,-124.24)  322.92                80
 07/21/2019   22:06:03   (   0.22,-126.98) (  -0.34,-129.49)  285.06                80