Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2023 6 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/09/2023   20:58:27   (  -0.00,-104.70) (   0.44,-102.81)  215.97                80
 06/11/2023   09:20:48   (   0.01,-104.72) (   0.82,-108.18)  395.33                80
 06/12/2023   08:59:47   (   0.00,-104.72) (  -0.23,-103.74)  112.22                80
 06/14/2023   21:06:34   (   0.00,-104.71) (  -0.02,-104.70)    3.37                80
 06/17/2023   09:10:34   (  -0.00,-104.74) (   0.22,-105.63)  102.20                80
 06/18/2023   08:49:31   (  -0.00,-104.74) (  -0.78,-101.18)  405.35                80
 06/19/2023   21:12:00   (   0.00,-104.72) (  -0.45,-106.59)  213.94                80
 06/20/2023   20:56:19   (   0.00,-104.72) (   0.62,-102.15)  294.07                80
 06/22/2023   09:18:40   (  -0.01,-104.75) (   0.64,-107.52)  316.26                80