Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2023 6 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)
 06/14/2023   21:06:35   (   0.02,-104.71) (   0.04,-104.71)    2.65                80
 06/17/2023   09:10:35   (  -0.02,-104.72) (   0.16,-105.64)  104.17                80
 06/18/2023   08:49:32   (  -0.02,-104.72) (  -0.84,-101.19)  403.31                80
 06/19/2023   21:12:02   (   0.02,-104.70) (  -0.39,-106.60)  215.75                80
 06/20/2023   20:56:19   (   0.01,-104.70) (   0.61,-102.15)  292.19                80
 06/22/2023   09:18:40   (  -0.01,-104.73) (   0.64,-107.52)  318.87                80
 06/23/2023   08:57:38   (  -0.00,-104.73) (  -0.36,-103.07)  188.96                80
 06/24/2023   21:20:07   (   0.00,-104.71) (  -0.86,-108.48)  430.15                80
 06/25/2023   21:04:25   (  -0.00,-104.71) (   0.15,-104.03)   78.07                80