Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 6 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/14/2019   22:06:14   (   0.04,-128.29) (  -0.23,-129.50)  137.77                80
 06/15/2019   21:49:59   (   0.03,-128.28) (   0.76,-124.92)  381.66                80
 06/17/2019   10:08:51   (  -0.05,-128.25) (   0.37,-130.14)  215.24                80
 06/18/2019   09:52:36   (  -0.04,-128.23) (  -0.62,-125.56)  303.62                80
 06/19/2019   22:11:37   (   0.07,-128.19) (  -0.54,-130.81)  298.72                80
 06/20/2019   21:55:23   (   0.06,-128.17) (   0.51,-126.24)  220.37                80
 06/22/2019   10:14:14   (  -0.08,-128.14) (   0.68,-131.44)  376.46                80
 06/23/2019   09:57:59   (  -0.07,-128.12) (  -0.37,-126.88)  142.17                80
 06/24/2019   22:17:00   (   0.09,-128.07) (  -0.83,-132.11)  461.24                80
 06/25/2019   22:00:45   (   0.08,-128.05) (   0.22,-127.55)   57.56                80