Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 11 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)
 12/01/2020   10:17:17   (   0.01,-127.94) (   0.63,-130.66)  310.88                80
 12/02/2020   09:55:40   (  -0.01,-127.96) (  -0.41,-126.08)  213.77                80
 12/03/2020   22:19:58   (  -0.02,-128.00) (  -0.75,-131.30)  376.50                80
 12/04/2020   21:58:21   (  -0.00,-128.01) (   0.30,-126.72)  147.46                80
 12/06/2020   10:22:29   (   0.03,-128.04) (   0.93,-131.90)  440.14                80
 12/07/2020   10:00:54   (   0.01,-128.06) (  -0.18,-127.33)   83.85                80
 12/09/2020   22:03:34   (  -0.03,-128.10) (   0.01,-127.96)   16.75                80
 12/12/2020   10:08:46   (   0.05,-128.13) (   0.17,-128.55)   48.55                80
 12/13/2020   09:47:09   (   0.03,-128.14) (  -0.88,-123.97)  474.74                80