Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 7 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/23/2020   22:40:58   (  -0.01,-137.19) (   0.02,-137.18)    3.45                80
 07/26/2020   10:43:32   (   0.01,-137.20) (   0.12,-137.79)   66.97                80
 07/27/2020   10:21:56   (   0.01,-137.20) (  -0.89,-133.21)  454.88                80
 07/28/2020   22:43:34   (  -0.01,-137.19) (  -0.28,-138.43)  141.53                80
 07/29/2020   22:27:18   (  -0.01,-137.18) (   0.74,-133.85)  379.93                80
 07/31/2020   10:48:48   (   0.02,-137.17) (   0.43,-139.04)  213.00                80
 08/01/2020   10:27:11   (   0.02,-137.16) (  -0.58,-134.46)  308.04                80
 08/02/2020   22:48:50   (  -0.02,-137.14) (  -0.57,-139.69)  289.47                80
 08/03/2020   22:32:33   (  -0.03,-137.13) (   0.44,-135.11)  231.40                80
 08/05/2020   10:51:23   (   0.03,-137.12) (   0.73,-140.30)  362.26                80