Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 3 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 03/26/2021   10:34:39   (  -0.04,-137.21) (  -0.46,-135.19)  230.00                80
 03/27/2021   22:58:56   (   0.03,-137.21) (  -0.66,-140.41)  364.42                80
 03/28/2021   22:37:19   (   0.04,-137.21) (   0.36,-135.82)  158.43                80
 03/30/2021   11:01:27   (  -0.03,-137.21) (   0.80,-141.00)  431.78                80
 03/31/2021   10:39:50   (  -0.04,-137.21) (  -0.22,-136.42)   90.43                80
 04/02/2021   22:45:09   (   0.03,-137.18) (   0.07,-137.04)   16.32                80
 04/05/2021   10:47:40   (  -0.03,-137.16) (   0.08,-137.63)   53.77                80
 04/06/2021   10:26:02   (  -0.02,-137.14) (  -0.94,-133.04)  467.65                80
 04/07/2021   22:47:38   (   0.02,-137.12) (  -0.22,-138.25)  129.13                80
 04/08/2021   22:31:21   (   0.02,-137.10) (   0.81,-133.67)  392.31                80