Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2023 6 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)
 06/20/2023   20:56:19   (   0.01,-104.71) (   0.59,-102.14)  292.48                80
 06/22/2023   09:18:40   (  -0.00,-104.72) (   0.66,-107.51)  318.88                80
 06/23/2023   08:57:38   (   0.01,-104.72) (  -0.35,-103.06)  188.93                80
 06/24/2023   21:20:07   (  -0.01,-104.71) (  -0.88,-108.47)  429.82                80
 06/25/2023   21:04:24   (  -0.02,-104.71) (   0.13,-104.02)   78.30                80
 06/28/2023   09:08:24   (   0.01,-104.74) (   0.04,-104.96)   24.90                80
 06/29/2023   08:47:22   (   0.01,-104.74) (  -0.97,-100.51)  482.78                80
 06/30/2023   21:09:50   (  -0.00,-104.71) (  -0.30,-105.91)  136.96                80
 07/01/2023   20:54:08   (   0.00,-104.71) (   0.72,-101.46)  370.51                80
 07/03/2023   09:16:30   (  -0.01,-104.73) (   0.46,-106.85)  241.12                80