Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2023 12 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/19/2023   09:01:25   (   0.00,-104.69) (  -0.75,-101.29)  388.08                80
 12/20/2023   21:23:48   (  -0.00,-104.66) (  -0.45,-106.67)  228.76                80
 12/21/2023   21:08:00   (  -0.01,-104.66) (   0.55,-102.19)  281.58                80
 12/23/2023   09:30:14   (   0.01,-104.70) (   0.67,-107.53)  323.60                80
 12/24/2023   09:09:06   (   0.01,-104.70) (  -0.33,-103.06)  186.59                80
 12/25/2023   21:31:29   (  -0.02,-104.66) (  -0.86,-108.44)  430.61                80
 12/26/2023   21:15:42   (  -0.02,-104.67) (   0.15,-103.97)   79.72                80
 12/29/2023   09:19:28   (   0.03,-104.70) (   0.05,-104.84)   14.85                80
 12/30/2023   08:58:20   (   0.03,-104.71) (  -0.97,-100.36)  495.58                80
 12/31/2023   21:20:43   (  -0.03,-104.68) (  -0.27,-105.74)  121.09                80
 01/01/2024   21:04:55   (  -0.03,-104.68) (   0.75,-101.26)  389.60                80