Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 9 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/10/2020   22:12:01   (   0.09,-128.07) (  -0.27,-129.73)  189.97                80
 09/11/2020   21:50:24   (   0.09,-128.09) (   0.75,-125.15)  334.62                80
 09/13/2020   10:11:54   (  -0.10,-128.17) (   0.38,-130.35)  248.88                80
 09/14/2020   09:55:38   (  -0.10,-128.19) (  -0.64,-125.77)  275.51                80
 09/15/2020   22:17:16   (   0.11,-128.18) (  -0.52,-131.00)  321.45                80
 09/16/2020   21:55:40   (   0.11,-128.19) (   0.50,-126.42)  202.62                80
 09/18/2020   10:17:10   (  -0.11,-128.26) (   0.62,-131.61)  381.72                80
 09/19/2020   10:00:54   (  -0.11,-128.28) (  -0.40,-127.03)  142.31                80
 09/20/2020   22:22:32   (   0.11,-128.26) (  -0.76,-132.26)  455.13                80
 09/21/2020   22:00:55   (   0.11,-128.27) (   0.26,-127.68)   68.28                80