Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 4 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/08/2020   22:46:22   (   0.02,-137.21) (  -0.47,-139.41)  251.43                80
 04/09/2020   22:30:06   (   0.02,-137.21) (   0.58,-134.84)  270.60                80
 04/11/2020   10:51:37   (  -0.02,-137.22) (   0.62,-140.03)  321.23                80
 04/12/2020   10:30:01   (  -0.02,-137.21) (  -0.43,-135.46)  200.22                80
 04/13/2020   22:51:40   (   0.02,-137.20) (  -0.75,-140.69)  396.88                80
 04/14/2020   22:35:23   (   0.02,-137.20) (   0.24,-136.10)  124.52                80
 04/16/2020   10:56:54   (  -0.01,-137.20) (   0.90,-141.30)  467.86                80
 04/17/2020   10:35:18   (  -0.01,-137.19) (  -0.09,-136.72)   53.25                80
 04/19/2020   22:38:01   (   0.00,-137.16) (  -0.04,-137.37)   23.78                80
 04/20/2020   22:21:44   (   0.00,-137.15) (   0.96,-132.79)  497.09                80