Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 11 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/20/2021   22:45:12   (  -0.01,-137.21) (   0.43,-135.34)  213.71                80
 11/22/2021   11:05:01   (   0.01,-137.20) (   0.82,-140.76)  405.58                80
 11/23/2021   10:49:25   (   0.01,-137.19) (  -0.16,-136.34)   96.91                80
 11/25/2021   22:51:20   (  -0.01,-137.16) (  -0.06,-137.43)   31.10                80
 11/26/2021   22:35:51   (  -0.01,-137.15) (   0.91,-133.04)  468.13                80
 11/28/2021   10:58:36   (   0.00,-137.13) (   0.29,-138.53)  159.70                80
 11/29/2021   10:37:50   (   0.00,-137.11) (  -0.65,-134.15)  337.17                80
 11/30/2021   23:00:52   (  -0.00,-137.08) (  -0.60,-139.70)  299.66                80
 12/01/2021   22:45:31   (  -0.00,-137.06) (   0.38,-135.35)  194.76                80
 12/03/2021   11:08:30   (   0.00,-137.03) (   0.86,-140.89)  440.50                80
 12/04/2021   10:47:53   (   0.00,-137.00) (  -0.09,-136.55)   51.13                80