Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 9 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/11/2020   21:50:24   (   0.09,-128.09) (   0.73,-125.15)  334.81                80
 09/13/2020   10:11:54   (  -0.10,-128.17) (   0.40,-130.35)  248.76                80
 09/14/2020   09:55:38   (  -0.10,-128.19) (  -0.63,-125.77)  275.68                80
 09/15/2020   22:17:16   (   0.11,-128.18) (  -0.54,-130.99)  321.07                80
 09/16/2020   21:55:40   (   0.11,-128.20) (   0.49,-126.41)  203.06                80
 09/18/2020   10:17:10   (  -0.11,-128.26) (   0.64,-131.61)  381.35                80
 09/19/2020   10:00:53   (  -0.11,-128.28) (  -0.38,-127.03)  142.71                80
 09/20/2020   22:22:32   (   0.11,-128.27) (  -0.78,-132.26)  454.50                80
 09/21/2020   22:00:55   (   0.11,-128.28) (   0.24,-127.67)   68.93                80
 09/24/2020   10:06:09   (  -0.12,-128.34) (  -0.15,-128.29)    6.66                80