Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 7 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)
 07/24/2019   10:08:44   (  -0.22,-128.09) (   0.26,-130.17)  237.83                80
 07/25/2019   09:52:29   (  -0.21,-128.11) (  -0.79,-125.60)  286.17                80
 07/26/2019   22:11:29   (   0.24,-128.12) (  -0.37,-130.85)  310.69                80
 07/27/2019   21:55:14   (   0.23,-128.14) (   0.62,-126.27)  213.01                80
 07/29/2019   10:14:07   (  -0.26,-128.20) (   0.50,-131.49)  374.98                80
 07/30/2019   09:57:53   (  -0.25,-128.22) (  -0.55,-126.92)  147.99                80
 07/31/2019   22:16:53   (   0.27,-128.21) (  -0.60,-132.17)  450.65                80
 08/01/2019   22:00:38   (   0.27,-128.22) (   0.39,-127.59)   72.25                80
 08/04/2019   10:00:35   (  -0.27,-128.29) (  -0.26,-128.23)    6.96                80