Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2023 7 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/15/2023   08:53:13   (   0.01,-104.73) (  -0.70,-101.70)  346.71                80
 07/16/2023   21:15:42   (  -0.01,-104.71) (  -0.56,-107.10)  272.62                80
 07/17/2023   20:59:59   (  -0.01,-104.71) (   0.47,-102.65)  235.19                80
 07/19/2023   09:22:19   (   0.01,-104.73) (   0.78,-108.02)  375.52                80
 07/20/2023   09:01:17   (   0.01,-104.73) (  -0.26,-103.57)  132.19                80
 07/21/2023   21:23:45   (  -0.01,-104.71) (  -1.00,-108.97)  487.20                80
 07/22/2023   21:08:03   (  -0.01,-104.71) (   0.04,-104.53)   20.92                80
 07/25/2023   09:12:01   (   0.01,-104.74) (   0.16,-105.45)   80.89                80
 07/26/2023   08:50:57   (   0.01,-104.74) (  -0.82,-100.99)  426.94                80
 07/27/2023   21:13:27   (  -0.01,-104.71) (  -0.37,-106.41)  192.91                80
 07/28/2023   20:57:43   (  -0.02,-104.71) (   0.61,-101.95)  314.89                80