Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 6 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/29/2020   21:52:28   (  -0.03,-128.07) (   0.45,-125.86)  251.29                80
 07/01/2020   10:16:39   (   0.03,-128.16) (   0.67,-131.06)  329.75                80
 07/02/2020   09:55:02   (   0.02,-128.19) (  -0.34,-126.48)  194.43                80
 07/03/2020   22:19:22   (  -0.03,-128.16) (  -0.80,-131.71)  404.14                80
 07/04/2020   22:00:25   (  -0.02,-128.18) (   0.21,-127.13)  120.08                80
 07/06/2020   10:21:55   (   0.02,-128.28) (   0.92,-132.33)  461.51                80
 07/07/2020   10:00:19   (   0.02,-128.29) (  -0.09,-127.74)   62.39                80
 07/09/2020   22:03:02   (  -0.02,-128.28) (  -0.03,-128.40)   12.74                80
 07/12/2020   10:08:16   (   0.02,-128.39) (   0.15,-129.01)   70.31                80
 07/13/2020   09:46:39   (   0.02,-128.41) (  -0.86,-124.43)  453.31                80