Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 3 25.  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   10:56:17   (  -0.04,-137.21) (   0.51,-139.79)  293.06                80
 03/26/2021   10:34:40   (  -0.04,-137.21) (  -0.51,-135.20)  230.09                80
 03/27/2021   22:58:56   (   0.03,-137.21) (  -0.68,-140.41)  364.40                80
 03/28/2021   22:37:19   (   0.04,-137.21) (   0.34,-135.82)  158.45                80
 03/30/2021   11:01:27   (  -0.03,-137.21) (   0.82,-141.00)  431.63                80
 03/31/2021   10:39:50   (  -0.04,-137.21) (  -0.20,-136.41)   90.61                80
 04/02/2021   22:45:08   (   0.03,-137.18) (   0.06,-137.04)   16.46                80
 04/05/2021   10:47:39   (  -0.03,-137.16) (   0.09,-137.63)   53.53                80
 04/06/2021   10:26:02   (  -0.02,-137.15) (  -0.94,-133.04)  467.92                80
 04/07/2021   22:47:38   (   0.02,-137.12) (  -0.22,-138.25)  128.94                80