Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2023 9 1.  Predictions up to the next  14.0 days:

     Date     Time(FY3D) FY3D Lat/Lon Date Time(LANDSAT-8) LANDSAT-8 Lat/Lon    Distance(km)  Time Diff(sec)
 09/01/2023   16:19:09   ( -73.33, 116.76) 09/01/2023   16:19:48  ( -73.34, 116.83)    2.60                39
 09/01/2023   17:09:54   (  73.24, -75.73) 09/01/2023   17:09:15  (  73.26, -75.69)    2.34                39
 09/04/2023   07:46:16   (  73.32,  65.04) 09/04/2023   07:46:49  (  73.32,  65.04)    0.34                33
 09/04/2023   08:36:59   ( -73.24,-127.45) 09/04/2023   08:36:18  ( -73.25,-127.47)    1.78                41
 09/06/2023   23:13:20   ( -73.31,  13.33) 09/06/2023   23:13:50  ( -73.34,  13.33)    3.26                30
 09/07/2023   00:04:05   (  73.24,-179.19) 09/07/2023   00:03:17  (  73.25,-179.21)    2.00                48
 09/09/2023   14:40:27   (  73.33, -38.44) 09/09/2023   14:40:50  (  73.32, -38.45)    0.68                23
 09/09/2023   15:31:11   ( -73.28, 128.98) 09/09/2023   15:30:19  ( -73.26, 129.05)    3.02                52
 09/12/2023   06:07:32   ( -73.32, -90.15) 09/12/2023   06:07:52  ( -73.31, -90.24)    2.85                20
 09/12/2023   06:58:17   (  73.26,  77.30) 09/12/2023   06:57:18  (  73.27,  77.32)    1.48                59
 09/14/2023   20:44:07   ( -74.05,  49.04) 09/14/2023   20:45:13  ( -73.96,  51.79)   84.85                66
 09/14/2023   21:34:39   (  73.36,-141.98) 09/14/2023   21:34:50  (  73.35,-141.90)    2.84                11
 09/14/2023   22:25:22   ( -73.25,  25.59) 09/14/2023   22:24:20  ( -73.23,  25.50)    3.01                62