Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 8 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/28/2021   22:37:16   (  -0.05,-137.21) (   0.66,-134.09)  356.19                80
 08/30/2021   10:58:43   (   0.05,-137.21) (   0.51,-139.26)  233.53                80
 08/31/2021   10:37:06   (   0.05,-137.22) (  -0.55,-134.68)  289.88                80
 09/01/2021   22:58:41   (  -0.04,-137.22) (  -0.61,-139.89)  303.22                80
 09/02/2021   22:42:22   (  -0.04,-137.22) (   0.39,-135.29)  219.80                80
 09/04/2021   11:03:50   (   0.02,-137.21) (   0.78,-140.46)  371.34                80
 09/05/2021   10:44:52   (   0.02,-137.21) (  -0.28,-135.88)  151.22                80
 09/06/2021   23:03:48   (  -0.01,-137.20) (  -0.88,-141.09)  443.10                80
 09/07/2021   22:47:29   (  -0.01,-137.19) (   0.13,-136.49)   79.43                80
 09/10/2021   10:49:59   (   0.01,-137.16) (  -0.02,-137.08)    9.90                80