Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 12 31.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/02/2021   10:10:36   (   0.19,-128.21) (   0.33,-128.87)   75.31                80
 01/03/2021   09:49:00   (   0.16,-128.20) (  -0.73,-124.30)  445.68                80
 01/04/2021   22:13:16   (  -0.21,-128.22) (  -0.48,-129.51)  146.08                80
 01/05/2021   21:51:40   (  -0.18,-128.21) (   0.58,-124.93)  374.61                80
 01/07/2021   10:15:47   (   0.22,-128.16) (   0.69,-130.09)  221.18                80
 01/08/2021   09:54:11   (   0.20,-128.14) (  -0.37,-125.51)  299.32                80
 01/09/2021   22:18:27   (  -0.25,-128.15) (  -0.84,-130.72)  293.40                80
 01/10/2021   21:56:50   (  -0.23,-128.13) (   0.22,-126.14)  226.60                80
 01/12/2021   10:20:59   (   0.27,-128.06) (   0.98,-131.32)  370.41                80
 01/13/2021   09:59:21   (   0.25,-128.04) (  -0.02,-126.73)  149.43                80