Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 7 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/27/2019   21:55:15   (   0.23,-128.15) (   0.68,-126.28)  214.42                80
 07/29/2019   10:14:07   (  -0.26,-128.21) (   0.50,-131.48)  373.94                80
 07/30/2019   09:57:53   (  -0.25,-128.23) (  -0.55,-126.92)  149.25                80
 07/31/2019   22:16:53   (   0.27,-128.23) (  -0.60,-132.16)  448.33                80
 08/01/2019   22:00:37   (   0.26,-128.24) (   0.40,-127.59)   74.78                80
 08/04/2019   10:00:35   (  -0.27,-128.31) (  -0.27,-128.23)    8.93                80
 08/06/2019   22:03:20   (   0.28,-128.32) (   0.13,-128.90)   66.76                80
 08/07/2019   21:47:06   (   0.28,-128.33) (   1.18,-124.33)  455.95                80
 08/09/2019   10:05:59   (  -0.30,-128.37) (  -0.06,-129.55)  133.63                80