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

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/15/2019   21:49:59   (   0.03,-128.28) (   0.77,-124.93)  381.65                80
 06/17/2019   10:08:51   (  -0.05,-128.25) (   0.35,-130.14)  215.41                80
 06/18/2019   09:52:36   (  -0.04,-128.23) (  -0.63,-125.56)  303.40                80
 06/19/2019   22:11:37   (   0.07,-128.19) (  -0.53,-130.81)  298.92                80
 06/20/2019   21:55:22   (   0.06,-128.17) (   0.46,-126.23)  220.12                80
 06/22/2019   10:14:14   (  -0.08,-128.14) (   0.67,-131.45)  376.85                80
 06/23/2019   09:57:59   (  -0.07,-128.12) (  -0.32,-126.87)  141.72                80
 06/24/2019   22:17:00   (   0.09,-128.07) (  -0.83,-132.12)  461.70                80
 06/25/2019   22:00:44   (   0.08,-128.04) (   0.16,-127.54)   57.04                80
 06/28/2019   10:03:22   (  -0.09,-127.99) (  -0.07,-128.19)   22.37                80