Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 7 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/19/2019   10:03:20   (  -0.20,-127.94) (   0.01,-128.85)  104.59                80
 07/20/2019   09:47:06   (  -0.19,-127.97) (  -1.03,-124.29)  419.92                80
 07/21/2019   22:06:06   (   0.21,-127.98) (  -0.13,-129.53)  176.26                80
 07/22/2019   21:49:51   (   0.20,-128.01) (   0.86,-124.95)  348.33                80
 07/24/2019   10:08:44   (  -0.22,-128.09) (   0.26,-130.17)  237.86                80
 07/25/2019   09:52:29   (  -0.22,-128.11) (  -0.79,-125.60)  286.11                80
 07/26/2019   22:11:30   (   0.24,-128.11) (  -0.37,-130.85)  311.53                80
 07/27/2019   21:55:14   (   0.23,-128.14) (   0.62,-126.27)  212.14                80
 07/29/2019   10:14:07   (  -0.26,-128.20) (   0.50,-131.49)  375.18                80
 07/30/2019   09:57:53   (  -0.25,-128.22) (  -0.55,-126.92)  147.75                80
 07/31/2019   22:16:53   (   0.27,-128.20) (  -0.60,-132.17)  451.67                80
 08/01/2019   22:00:38   (   0.27,-128.22) (   0.39,-127.59)   71.21                80