Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 8 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)
 08/22/2021   22:48:27   (  -0.04,-137.19) (  -0.12,-137.48)   33.07                80
 08/23/2021   22:32:09   (  -0.04,-137.20) (   0.94,-132.89)  490.77                80
 08/25/2021   10:53:36   (   0.03,-137.21) (   0.25,-138.06)   97.48                80
 08/26/2021   10:31:59   (   0.04,-137.22) (  -0.81,-133.48)  426.11                80
 08/27/2021   22:53:34   (  -0.03,-137.21) (  -0.35,-138.69)  168.24                80
 08/28/2021   22:37:16   (  -0.03,-137.21) (   0.66,-134.09)  354.97                80
 08/30/2021   10:56:04   (   0.03,-137.21) (   0.47,-139.28)  234.46                80
 08/31/2021   10:39:46   (   0.02,-137.21) (  -0.53,-134.68)  288.13                80
 09/01/2021   22:58:41   (  -0.01,-137.19) (  -0.62,-139.89)  308.01                80
 09/02/2021   22:42:23   (  -0.00,-137.18) (   0.44,-135.30)  214.04                80