Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2019 12 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/27/2019   21:59:04   (   0.03,-128.19) (   0.28,-127.20)  112.81                80
 12/29/2019   10:17:55   (  -0.04,-128.25) (   0.89,-132.40)  473.51                80
 12/30/2019   10:01:40   (  -0.04,-128.27) (  -0.14,-127.83)   50.47                80
 01/01/2020   22:01:44   (   0.04,-128.29) (   0.00,-128.49)   22.46                80
 01/04/2020   10:04:19   (  -0.05,-128.37) (   0.13,-129.12)   85.74                80
 01/05/2020   09:48:04   (  -0.04,-128.38) (  -0.90,-124.54)  437.75                80
 01/06/2020   22:07:03   (   0.05,-128.37) (  -0.27,-129.78)  159.70                80
 01/07/2020   21:50:48   (   0.04,-128.39) (   0.76,-125.20)  363.17                80
 01/09/2020   10:09:39   (  -0.04,-128.43) (   0.39,-130.40)  225.29                80