Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2023 6 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/08/2023   21:14:09   (   0.00,-104.70) (  -0.56,-107.26)  291.76                80
 06/09/2023   20:58:27   (   0.00,-104.70) (   0.43,-102.81)  215.94                80
 06/11/2023   09:20:49   (  -0.01,-104.72) (   0.77,-108.19)  395.38                80
 06/12/2023   08:59:47   (  -0.01,-104.73) (  -0.22,-103.74)  112.23                80
 06/14/2023   21:06:35   (   0.00,-104.71) (   0.02,-104.71)    2.38                80
 06/17/2023   09:10:34   (  -0.01,-104.74) (   0.17,-105.64)  101.78                80
 06/18/2023   08:49:32   (  -0.01,-104.74) (  -0.83,-101.19)  405.75                80
 06/19/2023   21:12:01   (   0.01,-104.72) (  -0.41,-106.60)  213.65                80
 06/20/2023   20:56:19   (   0.02,-104.73) (   0.60,-102.15)  294.29                80