Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 7 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/17/2019   21:44:28   (   0.18,-127.86) (   1.14,-123.64)  481.06                80
 07/19/2019   10:03:20   (  -0.20,-127.94) (   0.03,-128.85)  104.44                80
 07/20/2019   09:47:05   (  -0.19,-127.97) (  -1.02,-124.28)  420.18                80
 07/21/2019   22:06:06   (   0.21,-127.98) (  -0.14,-129.53)  176.28                80
 07/22/2019   21:49:51   (   0.20,-128.01) (   0.91,-124.96)  348.37                80
 07/24/2019   10:08:43   (  -0.23,-128.09) (   0.27,-130.17)  237.34                80
 07/25/2019   09:52:29   (  -0.22,-128.12) (  -0.78,-125.60)  286.72                80
 07/26/2019   22:11:29   (   0.24,-128.12) (  -0.37,-130.85)  311.17                80
 07/27/2019   21:55:14   (   0.23,-128.14) (   0.63,-126.27)  212.58                80
 07/29/2019   10:14:07   (  -0.26,-128.21) (   0.50,-131.49)  374.27                80
 07/30/2019   09:57:53   (  -0.25,-128.23) (  -0.55,-126.92)  148.75                80