Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 6 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/29/2019   09:44:27   (  -0.08,-127.93) (  -1.02,-123.60)  493.39                80
 06/30/2019   22:03:28   (   0.11,-127.89) (  -0.12,-128.85)  109.89                80
 07/01/2019   21:47:13   (   0.10,-127.85) (   0.93,-124.28)  407.72                80
 07/03/2019   10:06:05   (  -0.12,-127.79) (   0.27,-129.48)  192.67                80
 07/04/2019   09:49:50   (  -0.11,-127.75) (  -0.77,-124.91)  324.23                80
 07/05/2019   22:08:50   (   0.14,-127.69) (  -0.42,-130.15)  280.78                80
 07/06/2019   21:52:35   (   0.13,-127.65) (   0.57,-125.57)  236.31                80
 07/08/2019   10:11:27   (  -0.15,-127.59) (   0.58,-130.78)  364.05                80
 07/09/2019   09:55:12   (  -0.14,-127.55) (  -0.41,-126.21)  152.59                80
 07/10/2019   22:14:13   (   0.16,-127.48) (  -0.71,-131.46)  453.51                80
 07/11/2019   21:57:58   (   0.15,-127.43) (   0.28,-126.88)   63.15                80