Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 6 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/13/2019   09:47:13   (  -0.01,-128.32) (  -0.92,-124.25)  463.18                80
 06/14/2019   22:06:14   (   0.04,-128.29) (  -0.24,-129.50)  137.84                80
 06/15/2019   21:50:00   (   0.03,-128.28) (   0.80,-124.93)  381.63                80
 06/17/2019   10:08:51   (  -0.05,-128.25) (   0.38,-130.14)  215.10                80
 06/18/2019   09:52:37   (  -0.04,-128.23) (  -0.66,-125.57)  303.81                80
 06/19/2019   22:11:38   (   0.07,-128.19) (  -0.49,-130.82)  298.58                80
 06/20/2019   21:55:22   (   0.06,-128.17) (   0.49,-126.24)  220.54                80
 06/22/2019   10:14:15   (  -0.08,-128.15) (   0.64,-131.45)  376.14                80
 06/23/2019   09:57:59   (  -0.07,-128.12) (  -0.35,-126.87)  142.51                80
 06/24/2019   22:17:00   (   0.09,-128.08) (  -0.79,-132.12)  460.89                80
 06/25/2019   22:00:45   (   0.08,-128.05) (   0.20,-127.55)   57.87                80