Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 7 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/26/2020   10:43:32   (   0.00,-137.20) (   0.13,-137.79)   66.81                80
 07/27/2020   10:21:55   (   0.00,-137.20) (  -0.88,-133.20)  455.13                80
 07/28/2020   22:43:34   (  -0.01,-137.19) (  -0.28,-138.43)  141.38                80
 07/29/2020   22:27:17   (  -0.01,-137.18) (   0.73,-133.85)  380.18                80
 07/31/2020   10:48:48   (   0.02,-137.18) (   0.43,-139.04)  212.31                80
 08/01/2020   10:27:11   (   0.02,-137.17) (  -0.58,-134.46)  308.83                80
 08/02/2020   22:48:49   (  -0.02,-137.15) (  -0.57,-139.69)  288.79                80
 08/03/2020   22:32:33   (  -0.02,-137.14) (   0.44,-135.10)  232.18                80
 08/05/2020   10:51:23   (   0.02,-137.13) (   0.72,-140.30)  361.03                80
 08/06/2020   10:32:27   (   0.02,-137.12) (  -0.29,-135.71)  159.73                80