Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 3 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 03/30/2021   11:01:27   (  -0.04,-137.21) (   0.84,-141.00)  431.59                80
 03/31/2021   10:39:50   (  -0.04,-137.21) (  -0.24,-136.42)   90.84                80
 04/02/2021   22:42:45   (   0.04,-137.20) (   0.09,-137.04)   18.13                64
 04/05/2021   10:47:40   (  -0.03,-137.17) (   0.05,-137.63)   52.47                80
 04/06/2021   10:26:02   (  -0.03,-137.16) (  -0.98,-133.05)  469.25                80
 04/07/2021   22:47:38   (   0.02,-137.14) (  -0.24,-138.25)  126.47                80
 04/08/2021   22:31:20   (   0.02,-137.13) (   0.79,-133.66)  395.18                80
 04/10/2021   10:52:49   (  -0.01,-137.11) (   0.39,-138.84)  197.40                80
 04/11/2021   10:31:11   (  -0.02,-137.09) (  -0.64,-134.25)  323.88                80
 04/12/2021   22:52:47   (   0.02,-137.07) (  -0.51,-139.47)  272.69                80