Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2023 4 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/14/2023   08:44:45   (   0.00,-104.72) (  -0.84,-100.91)  434.32                80
 04/15/2023   21:07:15   (  -0.00,-104.72) (  -0.36,-106.33)  182.79                80
 04/16/2023   20:51:33   (  -0.00,-104.73) (   0.66,-101.88)  325.04                80
 04/18/2023   09:13:53   (   0.00,-104.73) (   0.55,-107.26)  287.93                80
 04/19/2023   08:52:49   (   0.00,-104.73) (  -0.42,-102.80)  219.80                80
 04/20/2023   21:15:20   (  -0.00,-104.73) (  -0.77,-108.22)  397.37                80
 04/21/2023   20:59:36   (  -0.00,-104.73) (   0.20,-103.76)  110.64                80
 04/24/2023   09:00:53   (   0.01,-104.73) (   0.02,-104.68)    6.63                80
 04/26/2023   21:05:00   (  -0.02,-104.73) (  -0.22,-105.64)  103.50                80