Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 6 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/12/2019   10:03:28   (  -0.02,-128.34) (   0.09,-128.83)   56.27                80
 06/13/2019   09:47:13   (  -0.01,-128.32) (  -0.90,-124.25)  463.20                80
 06/14/2019   22:06:15   (   0.04,-128.29) (  -0.21,-129.51)  137.89                80
 06/15/2019   21:49:59   (   0.03,-128.28) (   0.77,-124.93)  381.60                80
 06/17/2019   10:08:52   (  -0.05,-128.25) (   0.36,-130.14)  215.00                80
 06/18/2019   09:52:36   (  -0.04,-128.23) (  -0.63,-125.56)  303.94                80
 06/19/2019   22:11:37   (   0.07,-128.20) (  -0.53,-130.81)  298.47                80
 06/20/2019   21:55:23   (   0.06,-128.18) (   0.51,-126.25)  220.67                80
 06/22/2019   10:14:14   (  -0.08,-128.15) (   0.68,-131.45)  375.94                80
 06/23/2019   09:58:00   (  -0.07,-128.13) (  -0.36,-126.88)  142.73                80
 06/24/2019   22:17:00   (   0.09,-128.08) (  -0.84,-132.12)  460.69                80
 06/25/2019   22:00:46   (   0.08,-128.06) (   0.20,-127.55)   58.08                80