Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 7 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/31/2019   22:16:53   (   0.27,-128.24) (  -0.60,-132.16)  447.39                80
 08/01/2019   22:00:37   (   0.26,-128.26) (   0.39,-127.58)   75.97                80
 08/04/2019   10:00:35   (  -0.27,-128.32) (  -0.27,-128.23)   10.76                80
 08/06/2019   22:03:21   (   0.28,-128.34) (   0.17,-128.91)   64.39                80
 08/07/2019   21:47:06   (   0.28,-128.35) (   1.17,-124.33)  458.48                80
 08/09/2019   10:05:59   (  -0.30,-128.40) (  -0.05,-129.55)  130.92                80
 08/10/2019   09:49:43   (  -0.29,-128.41) (  -1.04,-124.97)  391.44                80
 08/11/2019   22:08:44   (   0.31,-128.40) (  -0.10,-130.22)  207.39                80
 08/12/2019   21:52:29   (   0.31,-128.41) (   0.96,-125.65)  314.89                80