Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 11 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)
 11/25/2021   22:50:39   (  -0.00,-137.20) (  -0.05,-137.26)    8.28                80
 11/26/2021   22:34:58   (  -0.01,-137.20) (   1.00,-132.83)  498.17                80
 11/28/2021   10:54:42   (   0.00,-137.19) (   0.21,-138.23)  118.15                80
 11/29/2021   10:39:00   (   0.00,-137.18) (  -0.75,-133.79)  387.21                80
 11/30/2021   22:58:53   (  -0.00,-137.17) (  -0.49,-139.22)  235.24                80
 12/01/2021   22:43:13   (  -0.00,-137.15) (   0.51,-134.79)  269.53                80
 12/03/2021   11:02:57   (   0.00,-137.14) (   0.71,-140.19)  348.58                80
 12/04/2021   10:44:38   (   0.01,-137.12) (  -0.31,-135.76)  155.24                80
 12/05/2021   23:07:12   (  -0.00,-137.08) (  -0.94,-141.20)  469.78                80
 12/06/2021   22:51:33   (  -0.00,-137.06) (   0.06,-136.77)   33.36                80