Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 4 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/10/2020   22:10:39   (   0.22,-127.75) (  -0.23,-129.85)  239.37                80
 04/11/2020   21:49:04   (   0.23,-127.78) (   0.82,-125.28)  286.10                80
 04/13/2020   10:13:14   (  -0.20,-127.84) (   0.38,-130.47)  299.55                80
 04/14/2020   09:51:39   (  -0.22,-127.87) (  -0.67,-125.90)  225.24                80
 04/15/2020   22:15:57   (   0.19,-127.91) (  -0.51,-131.12)  365.50                80
 04/16/2020   21:54:21   (   0.20,-127.95) (   0.49,-126.54)  159.65                80
 04/18/2020   10:18:32   (  -0.17,-128.00) (   0.66,-131.74)  425.75                80
 04/19/2020   09:56:56   (  -0.19,-128.03) (  -0.40,-127.17)   98.82                80
 04/20/2020   22:21:14   (   0.16,-128.06) (  -0.84,-132.38)  492.81                80
 04/21/2020   21:59:38   (   0.17,-128.10) (   0.22,-127.81)   32.02                80