Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 6 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)
 07/01/2020   10:16:38   (   0.03,-128.16) (   0.70,-131.05)  329.79                80
 07/02/2020   09:55:03   (   0.02,-128.19) (  -0.37,-126.48)  194.37                80
 07/03/2020   22:19:21   (  -0.03,-128.16) (  -0.83,-131.70)  404.17                80
 07/04/2020   21:57:46   (  -0.02,-128.18) (   0.23,-127.13)  120.06                80
 07/06/2020   10:21:55   (   0.02,-128.28) (   0.95,-132.32)  461.60                80
 07/07/2020   10:00:19   (   0.02,-128.29) (  -0.12,-127.75)   62.29                80
 07/09/2020   22:05:41   (  -0.02,-128.28) (  -0.06,-128.39)   12.86                80
 07/12/2020   10:08:16   (   0.02,-128.39) (   0.13,-129.02)   70.51                80
 07/13/2020   09:46:40   (   0.02,-128.41) (  -0.88,-124.43)  453.16                80