Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 2 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)
 02/21/2020   22:39:10   (  -0.03,-137.22) (  -0.01,-137.11)   12.30                80
 02/24/2020   10:41:45   (   0.03,-137.20) (   0.14,-137.73)   60.10                80
 02/25/2020   10:20:09   (   0.03,-137.20) (  -0.90,-133.16)  460.96                80
 02/26/2020   22:41:49   (  -0.03,-137.19) (  -0.29,-138.39)  135.86                80
 02/27/2020   22:25:33   (  -0.03,-137.18) (   0.75,-133.81)  384.97                80
 02/29/2020   10:47:03   (   0.03,-137.16) (   0.43,-139.01)  209.69                80
 03/01/2020   10:25:27   (   0.04,-137.15) (  -0.55,-134.42)  310.61                80
 03/02/2020   22:47:06   (  -0.04,-137.13) (  -0.63,-139.65)  287.65                80
 03/03/2020   22:30:51   (  -0.04,-137.11) (   0.41,-135.08)  232.18                80
 03/05/2020   10:49:41   (   0.04,-137.08) (   0.77,-140.27)  364.13                80