Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 1 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/30/2020   10:11:59   (  -0.04,-128.26) (   0.56,-130.93)  304.23                80
 01/31/2020   09:55:44   (  -0.04,-128.24) (  -0.47,-126.36)  215.00                80
 02/01/2020   22:17:23   (   0.04,-128.21) (  -0.75,-131.58)  384.93                80
 02/02/2020   21:55:48   (   0.03,-128.18) (   0.29,-127.01)  133.79                80
 02/04/2020   10:17:18   (  -0.03,-128.13) (   0.88,-132.20)  464.12                80
 02/05/2020   10:01:02   (  -0.03,-128.10) (  -0.15,-127.63)   54.29                80
 02/07/2020   22:03:45   (  -0.01,-128.03) (  -0.09,-128.27)   28.28                80
 02/08/2020   21:42:10   (  -0.01,-127.99) (   0.94,-123.69)  489.28                80
 02/10/2020   10:03:40   (   0.01,-127.92) (   0.23,-128.89)  110.30                80
 02/11/2020   09:47:25   (   0.01,-127.89) (  -0.80,-124.31)  407.17                80
 02/12/2020   22:09:04   (  -0.00,-127.84) (  -0.40,-129.54)  194.75                80