Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2023 7 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/11/2023   21:07:37   (   0.01,-104.72) (  -0.13,-105.22)   58.18                80
 07/12/2023   20:51:55   (   0.02,-104.72) (   0.90,-100.77)  449.91                80
 07/14/2023   09:14:16   (  -0.01,-104.74) (   0.31,-106.15)  160.75                80
 07/15/2023   08:53:14   (  -0.01,-104.74) (  -0.72,-101.70)  346.95                80
 07/16/2023   21:15:42   (   0.01,-104.72) (  -0.54,-107.10)  272.40                80
 07/17/2023   21:00:00   (   0.01,-104.72) (   0.49,-102.66)  235.67                80
 07/19/2023   09:22:21   (  -0.02,-104.75) (   0.71,-108.04)  374.20                80
 07/20/2023   09:01:18   (  -0.01,-104.75) (  -0.27,-103.58)  133.86                80
 07/21/2023   21:23:47   (   0.01,-104.73) (  -0.93,-108.99)  485.45                80
 07/22/2023   21:08:03   (   0.01,-104.74) (   0.05,-104.53)   23.07                80