Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 9 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/16/2020   10:55:33   (   0.04,-137.20) (   0.90,-141.17)  452.39                80
 09/17/2020   10:39:16   (   0.04,-137.19) (  -0.12,-136.59)   69.66                80
 09/19/2020   22:41:58   (  -0.04,-137.19) (  -0.02,-137.23)    5.33                80
 09/22/2020   10:41:51   (   0.03,-137.17) (   0.17,-137.84)   76.09                80
 09/23/2020   10:25:35   (   0.03,-137.16) (  -0.86,-133.26)  444.91                80
 09/24/2020   22:44:33   (  -0.03,-137.14) (  -0.31,-138.48)  152.94                80
 09/25/2020   22:28:16   (  -0.02,-137.13) (   0.71,-133.90)  367.71                80
 09/27/2020   10:47:06   (   0.01,-137.11) (   0.45,-139.09)  226.27                80
 09/28/2020   10:30:49   (   0.01,-137.09) (  -0.58,-134.51)  294.24                80
 09/29/2020   22:49:48   (  -0.01,-137.07) (  -0.59,-139.74)  304.09                80