Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 7 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/26/2019   22:11:29   (   0.24,-128.13) (  -0.39,-130.84)  309.67                80
 07/27/2019   21:55:14   (   0.23,-128.15) (   0.66,-126.27)  214.18                80
 07/29/2019   10:14:08   (  -0.26,-128.21) (   0.46,-131.49)  374.12                80
 07/30/2019   09:57:52   (  -0.25,-128.22) (  -0.54,-126.92)  149.01                80
 07/31/2019   22:16:53   (   0.27,-128.22) (  -0.61,-132.16)  448.79                80
 08/01/2019   22:00:38   (   0.26,-128.24) (   0.44,-127.60)   74.32                80
 08/04/2019   10:03:16   (  -0.27,-128.30) (  -0.31,-128.24)    8.60                80
 08/06/2019   22:03:21   (   0.28,-128.31) (   0.17,-128.90)   67.51                80
 08/07/2019   21:47:05   (   0.28,-128.32) (   1.16,-124.33)  455.09                80