Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 3 31.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 03/31/2021   10:39:50   (  -0.04,-137.21) (  -0.22,-136.41)   90.70                80
 04/02/2021   22:45:09   (   0.04,-137.20) (   0.06,-137.04)   18.27                80
 04/05/2021   10:47:39   (  -0.03,-137.17) (   0.08,-137.63)   52.38                80
 04/06/2021   10:26:02   (  -0.03,-137.16) (  -0.94,-133.04)  469.24                80
 04/07/2021   22:47:38   (   0.02,-137.14) (  -0.22,-138.25)  126.13                80
 04/08/2021   22:31:21   (   0.02,-137.13) (   0.80,-133.66)  395.53                80
 04/10/2021   10:52:49   (  -0.01,-137.11) (   0.37,-138.84)  197.33                80
 04/11/2021   10:31:12   (  -0.02,-137.10) (  -0.65,-134.25)  323.94                80
 04/12/2021   22:52:48   (   0.02,-137.07) (  -0.50,-139.47)  272.32                80
 04/13/2021   22:36:30   (   0.02,-137.06) (   0.52,-134.88)  248.72                80