Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 9 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/27/2020   10:47:05   (   0.04,-137.21) (   0.47,-139.08)  213.85                80
 09/28/2020   10:30:49   (   0.04,-137.20) (  -0.55,-134.50)  307.91                80
 09/29/2020   22:49:47   (  -0.03,-137.19) (  -0.63,-139.72)  289.62                80
 09/30/2020   22:33:31   (  -0.03,-137.18) (   0.40,-135.14)  232.10                80
 10/02/2020   10:52:20   (   0.03,-137.18) (   0.75,-140.33)  359.27                80
 10/03/2020   10:36:04   (   0.03,-137.18) (  -0.27,-135.75)  162.14                80
 10/04/2020   22:55:02   (  -0.03,-137.15) (  -0.91,-140.98)  436.27                80
 10/05/2020   22:38:45   (  -0.03,-137.14) (   0.12,-136.39)   84.67                80
 10/08/2020   10:41:18   (   0.03,-137.11) (  -0.00,-137.00)   12.25                80
 10/10/2020   22:41:20   (  -0.02,-137.05) (  -0.15,-137.65)   68.16                80