Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 12 2.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/03/2019   10:10:11   (   0.01,-128.33) (   0.51,-130.55)  253.15                80
 12/04/2019   09:53:56   (   0.02,-128.31) (  -0.51,-125.97)  266.21                80
 12/05/2019   22:12:55   (   0.00,-128.24) (  -0.66,-131.21)  338.35                80
 12/06/2019   21:56:40   (  -0.01,-128.22) (   0.36,-126.63)  180.86                80
 12/08/2019   10:15:32   (  -0.01,-128.22) (   0.78,-131.84)  412.85                80
 12/09/2019   09:59:15   (   0.00,-128.19) (  -0.18,-127.26)  106.05                80
 12/10/2019   22:18:15   (   0.02,-128.11) (  -0.98,-132.49)  499.50                80
 12/11/2019   22:01:59   (   0.00,-128.08) (   0.04,-127.92)   18.86                80
 12/14/2019   10:01:55   (  -0.01,-128.03) (   0.14,-128.54)   58.45                80
 12/15/2019   09:45:40   (   0.00,-128.00) (  -0.88,-123.96)  459.29                80