Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 2 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 02/12/2021   10:31:08   (  -0.03,-137.22) (  -0.63,-134.59)  299.85                80
 02/13/2021   22:55:26   (   0.02,-137.22) (  -0.56,-139.81)  294.29                80
 02/14/2021   22:36:28   (   0.03,-137.22) (   0.45,-135.22)  228.37                80
 02/16/2021   10:57:56   (  -0.02,-137.22) (   0.68,-140.40)  362.72                80
 02/17/2021   10:36:19   (  -0.02,-137.21) (  -0.32,-135.81)  159.54                80
 02/18/2021   22:57:56   (   0.02,-137.21) (  -0.86,-141.03)  435.72                80
 02/19/2021   22:41:40   (   0.02,-137.20) (   0.21,-136.45)   86.22                80
 02/22/2021   10:41:30   (   0.00,-137.17) (  -0.02,-137.03)   15.49                80
 02/24/2021   22:44:09   (  -0.01,-137.13) (  -0.15,-137.66)   60.56                80
 02/25/2021   22:27:53   (  -0.00,-137.11) (   0.92,-133.08)  460.22                80