Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 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)
 12/03/2020   22:19:57   (  -0.02,-128.00) (  -0.77,-131.30)  375.95                80
 12/04/2020   21:58:21   (  -0.00,-128.02) (   0.27,-126.72)  148.11                80
 12/06/2020   10:22:30   (   0.03,-128.04) (   0.89,-131.90)  439.69                80
 12/07/2020   10:00:54   (   0.01,-128.06) (  -0.15,-127.32)   84.32                80
 12/09/2020   22:03:33   (  -0.03,-128.11) (  -0.01,-127.95)   17.90                80
 12/12/2020   10:08:46   (   0.05,-128.14) (   0.13,-128.56)   47.54                80
 12/13/2020   09:47:10   (   0.03,-128.15) (  -0.92,-123.98)  475.76                80
 12/14/2020   22:11:26   (  -0.07,-128.17) (  -0.28,-129.19)  115.45                80
 12/15/2020   21:49:50   (  -0.05,-128.18) (   0.77,-124.61)  407.25                80