Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 3 29.  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,-137.22) (   0.81,-141.00)  431.53                80
 03/31/2021   10:39:50   (  -0.04,-137.21) (  -0.21,-136.41)   90.84                80
 04/02/2021   22:45:08   (   0.04,-137.19) (   0.06,-137.04)   17.79                80
 04/05/2021   10:47:39   (  -0.03,-137.17) (   0.08,-137.63)   52.51                80
 04/06/2021   10:26:02   (  -0.03,-137.16) (  -0.94,-133.04)  469.08                80
 04/07/2021   22:47:38   (   0.02,-137.14) (  -0.22,-138.25)  126.88                80
 04/08/2021   22:31:21   (   0.02,-137.12) (   0.81,-133.67)  394.74                80
 04/10/2021   10:52:49   (  -0.01,-137.11) (   0.36,-138.84)  197.70                80
 04/11/2021   10:31:11   (  -0.02,-137.09) (  -0.66,-134.26)  323.55                80