Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2022 1 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/18/2022   22:58:14   (   0.03,-137.21) (  -0.34,-138.73)  174.32                80
 01/19/2022   22:42:31   (   0.03,-137.21) (   0.67,-134.29)  332.93                80
 01/21/2022   11:04:54   (  -0.03,-137.22) (   0.50,-139.69)  281.22                80
 01/22/2022   10:43:51   (  -0.03,-137.22) (  -0.51,-135.24)  225.69                80
 01/23/2022   23:06:20   (   0.03,-137.21) (  -0.77,-140.65)  393.73                80
 01/24/2022   22:50:37   (   0.03,-137.20) (   0.24,-136.21)  112.86                80
 01/27/2022   10:51:56   (  -0.02,-137.19) (  -0.02,-137.15)    3.91                80
 01/29/2022   22:56:02   (  -0.02,-137.14) (  -0.23,-138.12)  111.41                80
 01/30/2022   22:40:19   (  -0.01,-137.13) (   0.79,-133.68)  393.76                80