Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 9 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/29/2020   22:49:47   (  -0.03,-137.19) (  -0.62,-139.73)  289.51                80
 09/30/2020   22:33:31   (  -0.03,-137.18) (   0.41,-135.14)  232.11                80
 10/02/2020   10:52:20   (   0.03,-137.18) (   0.74,-140.33)  359.60                80
 10/03/2020   10:36:04   (   0.03,-137.17) (  -0.28,-135.75)  161.72                80
 10/04/2020   22:55:02   (  -0.03,-137.15) (  -0.90,-140.98)  436.59                80
 10/05/2020   22:38:46   (  -0.03,-137.14) (   0.12,-136.39)   84.26                80
 10/08/2020   10:41:18   (   0.03,-137.10) (  -0.00,-137.00)   11.46                80
 10/10/2020   22:41:20   (  -0.02,-137.04) (  -0.15,-137.65)   69.00                80
 10/11/2020   22:25:04   (  -0.02,-137.02) (   0.88,-133.07)  450.55                80