Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2022 7 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/21/2022   23:15:34   (  -0.06,-137.29) (  -0.82,-140.73)  392.18                80
 07/22/2022   22:54:29   (  -0.05,-137.29) (   0.20,-136.28)  115.39                80
 07/24/2022   11:19:27   (   0.05,-137.27) (   1.02,-141.65)  498.67                80
 07/25/2022   10:58:22   (   0.04,-137.26) (  -0.00,-137.20)    8.94                80
 07/27/2022   23:02:24   (  -0.04,-137.23) (  -0.22,-138.15)  103.37                80
 07/28/2022   22:46:38   (  -0.03,-137.22) (   0.74,-133.68)  403.36                80
 07/30/2022   11:08:56   (   0.04,-137.20) (   0.47,-139.05)  211.69                80
 07/31/2022   10:47:51   (   0.04,-137.18) (  -0.56,-134.60)  294.80                80
 08/01/2022   23:10:18   (  -0.03,-137.16) (  -0.69,-140.00)  324.68                80
 08/02/2022   22:54:33   (  -0.03,-137.14) (   0.34,-135.55)  181.55                80