Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2023 7 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)
 07/20/2023   09:01:17   (   0.01,-104.73) (  -0.25,-103.57)  131.98                80
 07/21/2023   21:23:45   (  -0.01,-104.70) (  -1.01,-108.97)  487.31                80
 07/22/2023   21:08:03   (  -0.02,-104.70) (   0.03,-104.52)   20.75                80
 07/25/2023   09:12:00   (   0.02,-104.73) (   0.17,-105.45)   81.43                80
 07/26/2023   08:50:57   (   0.02,-104.73) (  -0.82,-100.99)  426.28                80
 07/27/2023   21:13:25   (  -0.02,-104.70) (  -0.44,-106.39)  193.58                80
 07/28/2023   20:57:43   (  -0.03,-104.70) (   0.61,-101.94)  314.13                80
 07/30/2023   09:20:03   (   0.03,-104.72) (   0.61,-107.32)  296.29                80
 07/31/2023   08:59:00   (   0.04,-104.71) (  -0.38,-102.86)  210.97                80
 08/01/2023   21:21:28   (  -0.05,-104.67) (  -0.87,-108.26)  409.80                80