Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 4 3.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/05/2021   10:47:39   (  -0.04,-137.15) (   0.09,-137.62)   54.77                80
 04/06/2021   10:26:02   (  -0.04,-137.13) (  -0.93,-133.04)  465.73                80
 04/07/2021   22:47:38   (   0.03,-137.11) (  -0.23,-138.25)  130.42                80
 04/08/2021   22:31:21   (   0.03,-137.08) (   0.79,-133.66)  390.02                80
 04/10/2021   10:52:49   (  -0.03,-137.03) (   0.38,-138.84)  205.73                80
 04/11/2021   10:31:12   (  -0.03,-137.01) (  -0.64,-134.25)  314.36                80
 04/12/2021   22:52:48   (   0.03,-136.98) (  -0.51,-139.46)  282.62                80
 04/13/2021   22:36:30   (   0.03,-136.95) (   0.51,-134.88)  237.20                80
 04/15/2021   10:57:59   (  -0.02,-136.89) (   0.67,-140.05)  359.67                80
 04/16/2021   10:36:21   (  -0.03,-136.86) (  -0.36,-135.46)  159.55                80