Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 9 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/19/2020   22:39:18   (  -0.04,-137.19) (  -0.07,-137.22)    5.45                80
 09/22/2020   10:41:51   (   0.04,-137.17) (   0.16,-137.84)   76.07                80
 09/23/2020   10:25:35   (   0.03,-137.16) (  -0.86,-133.26)  444.95                80
 09/24/2020   22:44:33   (  -0.03,-137.14) (  -0.31,-138.48)  153.10                80
 09/25/2020   22:28:17   (  -0.02,-137.12) (   0.71,-133.90)  367.53                80
 09/27/2020   10:47:06   (   0.01,-137.11) (   0.46,-139.09)  226.30                80
 09/28/2020   10:30:50   (   0.01,-137.09) (  -0.57,-134.51)  294.19                80
 09/29/2020   22:49:48   (  -0.01,-137.07) (  -0.61,-139.73)  304.35                80
 09/30/2020   22:33:31   (  -0.01,-137.05) (   0.41,-135.15)  216.10                80