Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 12 3.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/04/2019   09:53:55   (   0.02,-128.31) (  -0.49,-125.97)  266.23                80
 12/05/2019   22:12:55   (   0.00,-128.24) (  -0.68,-131.20)  338.35                80
 12/06/2019   21:56:39   (  -0.01,-128.22) (   0.34,-126.63)  180.85                80
 12/08/2019   10:15:32   (  -0.01,-128.22) (   0.79,-131.84)  412.88                80
 12/09/2019   09:59:16   (   0.00,-128.19) (  -0.23,-127.26)  105.98                80
 12/10/2019   22:18:14   (   0.02,-128.11) (  -0.99,-132.49)  499.60                80
 12/11/2019   22:01:59   (   0.00,-128.08) (   0.03,-127.91)   18.83                80
 12/14/2019   10:01:56   (  -0.01,-128.03) (   0.09,-128.55)   58.53                80
 12/15/2019   09:45:39   (   0.00,-127.99) (  -0.87,-123.96)  459.15                80
 12/16/2019   22:04:39   (   0.02,-127.90) (  -0.29,-129.19)  148.03                80