Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 6 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)
 06/21/2020   22:47:15   (  -0.01,-137.20) (  -0.34,-138.79)  181.15                80
 06/22/2020   22:25:39   (  -0.00,-137.19) (   0.67,-134.21)  340.17                80
 06/24/2020   10:49:48   (   0.00,-137.18) (   0.51,-139.39)  252.40                80
 06/25/2020   10:28:12   (   0.00,-137.17) (  -0.56,-134.82)  268.63                80
 06/26/2020   22:52:31   (  -0.01,-137.16) (  -0.66,-140.04)  329.07                80
 06/27/2020   22:30:54   (  -0.01,-137.15) (   0.35,-135.46)  191.73                80
 06/29/2020   10:55:04   (   0.01,-137.13) (   0.78,-140.66)  401.83                80
 06/30/2020   10:33:28   (   0.00,-137.11) (  -0.23,-136.07)  118.44                80
 07/01/2020   22:57:47   (   0.00,-137.09) (  -0.92,-141.31)  480.63                80
 07/02/2020   22:38:51   (   0.01,-137.07) (   0.09,-136.73)   39.23                80