Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 4 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/21/2021   10:41:32   (  -0.03,-137.20) (  -0.15,-136.69)   59.01                80
 04/23/2021   22:46:49   (   0.02,-137.20) (  -0.03,-137.30)   12.70                80
 04/26/2021   10:49:21   (  -0.02,-137.20) (   0.11,-137.91)   80.11                80
 04/27/2021   10:27:44   (  -0.02,-137.19) (  -0.92,-133.32)  442.08                80
 04/28/2021   22:51:59   (   0.02,-137.17) (  -0.29,-138.52)  153.76                80
 04/29/2021   22:30:22   (   0.02,-137.16) (   0.74,-133.93)  367.93                80
 05/01/2021   10:54:30   (  -0.02,-137.14) (   0.42,-139.11)  224.07                80
 05/02/2021   10:32:52   (  -0.02,-137.13) (  -0.61,-134.52)  297.24                80
 05/03/2021   22:54:28   (   0.01,-137.10) (  -0.59,-139.73)  299.70                80
 05/04/2021   22:38:10   (   0.01,-137.08) (   0.44,-135.14)  221.57                80