Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 4 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/06/2021   10:26:03   (  -0.04,-137.21) (  -0.98,-133.04)  474.81                80
 04/07/2021   22:47:39   (   0.03,-137.22) (  -0.19,-138.26)  118.44                80
 04/08/2021   22:31:21   (   0.03,-137.21) (   0.83,-133.67)  404.30                80
 04/10/2021   10:52:50   (  -0.03,-137.20) (   0.34,-138.85)  187.32                80
 04/11/2021   10:31:12   (  -0.03,-137.20) (  -0.69,-134.26)  335.04                80
 04/12/2021   22:52:48   (   0.03,-137.20) (  -0.47,-139.47)  259.07                80
 04/13/2021   22:36:31   (   0.03,-137.19) (   0.55,-134.88)  263.02                80
 04/15/2021   10:57:59   (  -0.03,-137.17) (   0.62,-140.06)  329.72                80
 04/16/2021   10:36:22   (  -0.03,-137.16) (  -0.40,-135.47)  191.76                80
 04/17/2021   22:57:58   (   0.02,-137.14) (  -0.75,-140.69)  403.91                80
 04/18/2021   22:41:41   (   0.02,-137.12) (   0.28,-136.10)  117.28                80