Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 8 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/27/2021   22:53:33   (  -0.05,-137.20) (  -0.40,-138.67)  168.21                80
 08/28/2021   22:37:16   (  -0.05,-137.20) (   0.66,-134.09)  354.70                80
 08/30/2021   10:58:43   (   0.04,-137.19) (   0.52,-139.26)  236.25                80
 08/31/2021   10:37:06   (   0.04,-137.18) (  -0.54,-134.68)  286.05                80
 09/01/2021   22:58:41   (  -0.03,-137.17) (  -0.62,-139.89)  309.30                80
 09/02/2021   22:42:23   (  -0.03,-137.16) (   0.39,-135.29)  212.56                80
 09/04/2021   11:01:11   (   0.01,-137.14) (   0.74,-140.47)  379.91                80
 09/05/2021   10:44:52   (   0.01,-137.12) (  -0.27,-135.88)  141.53                80
 09/06/2021   23:03:48   (  -0.00,-137.09) (  -0.89,-141.09)  454.94                80
 09/07/2021   22:47:29   (  -0.00,-137.08) (   0.11,-136.49)   66.47                80