Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2023 4 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)
 04/21/2023   20:59:36   (   0.00,-104.73) (   0.24,-103.76)  111.37                80
 04/24/2023   09:00:53   (  -0.00,-104.74) (  -0.04,-104.68)    7.25                80
 04/26/2023   21:04:59   (   0.00,-104.73) (  -0.20,-105.64)  102.82                80
 04/27/2023   20:49:15   (  -0.00,-104.74) (   0.79,-101.18)  405.32                80
 04/29/2023   09:11:36   (  -0.00,-104.75) (   0.38,-106.56)  206.26                80
 04/30/2023   08:50:32   (  -0.00,-104.75) (  -0.62,-102.11)  301.82                80
 05/01/2023   21:13:01   (   0.00,-104.74) (  -0.65,-107.51)  315.72                80
 05/02/2023   20:57:17   (   0.00,-104.75) (   0.36,-103.05)  192.78                80
 05/04/2023   09:19:37   (  -0.00,-104.76) (   0.80,-108.44)  418.02                80