Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 3 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 03/25/2021   10:56:16   (  -0.03,-137.21) (   0.57,-139.78)  293.06                80
 03/26/2021   10:34:40   (  -0.03,-137.21) (  -0.51,-135.20)  229.93                80
 03/27/2021   22:58:56   (   0.03,-137.20) (  -0.68,-140.41)  365.04                80
 03/28/2021   22:37:19   (   0.03,-137.20) (   0.35,-135.82)  157.62                80
 03/30/2021   11:01:27   (  -0.03,-137.20) (   0.81,-141.00)  432.60                80
 03/31/2021   10:39:50   (  -0.03,-137.20) (  -0.21,-136.41)   89.44                80
 04/02/2021   22:42:28   (   0.03,-137.16) (   0.06,-137.04)   14.67                80
 04/05/2021   10:47:39   (  -0.02,-137.14) (   0.08,-137.63)   55.67                80
 04/06/2021   10:26:02   (  -0.01,-137.12) (  -0.95,-133.04)  465.63                80