Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 7 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/10/2019   22:14:13   (   0.16,-127.60) (  -0.71,-131.46)  439.58                80
 07/11/2019   21:57:59   (   0.15,-127.65) (   0.34,-126.89)   86.33                80
 07/13/2019   10:16:52   (  -0.18,-127.74) (   0.77,-132.11)  497.67                80
 07/14/2019   10:00:37   (  -0.17,-127.78) (  -0.22,-127.53)   27.71                80
 07/16/2019   22:00:43   (   0.19,-127.84) (   0.09,-128.21)   42.35                80
 07/17/2019   21:44:28   (   0.18,-127.88) (   1.14,-123.64)  483.01                80
 07/19/2019   10:03:21   (  -0.20,-127.97) (  -0.02,-128.86)  101.64                80
 07/20/2019   09:47:06   (  -0.19,-128.00) (  -1.01,-124.28)  423.40                80
 07/21/2019   22:06:07   (   0.21,-128.02) (  -0.10,-129.54)  172.61                80
 07/22/2019   21:49:52   (   0.20,-128.05) (   0.89,-124.96)  352.45                80
 07/24/2019   10:08:45   (  -0.23,-128.14) (   0.23,-130.18)  232.52                80