Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2023 7 30.  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)
 07/31/2023   22:53:57   ( -73.81,  16.52) 07/31/2023   22:55:05  ( -73.68,  18.67)   68.30                68
 07/31/2023   23:44:31   (  73.20,-174.75) 07/31/2023   23:44:39  (  73.18,-174.74)    2.38                 8
 08/01/2023   00:35:13   ( -73.09,  -7.20) 08/01/2023   00:34:08  ( -73.11,  -7.24)    2.52                65
 08/03/2023   14:21:00   (  73.54, -34.59) 08/03/2023   14:22:11  (  73.43, -33.61)   33.12                71
 08/03/2023   15:11:37   ( -73.18, 133.55) 08/03/2023   15:11:43  ( -73.21, 133.57)    3.49                 6
 08/03/2023   16:02:23   (  73.12, -59.01) 08/03/2023   16:01:10  (  73.12, -58.97)    1.33                73
 08/06/2023   05:48:05   ( -73.48, -86.18) 08/06/2023   05:49:17  ( -73.35, -85.56)   24.49                72
 08/06/2023   06:38:47   (  73.22,  81.72) 08/06/2023   06:38:45  (  73.20,  81.79)    3.14                 2
 08/06/2023   07:29:28   ( -73.06,-110.61) 08/06/2023   07:28:15  ( -73.09,-110.81)    7.21                73
 08/08/2023   21:15:10   (  73.28,-137.46) 08/08/2023   21:16:20  (  73.26,-137.50)    2.46                70
 08/08/2023   22:05:53   ( -73.21,  30.00) 08/08/2023   22:05:49  ( -73.20,  30.02)    1.52                 4
 08/08/2023   22:56:31   (  72.75,-161.70) 08/08/2023   22:55:21  (  72.84,-163.05)   45.58                70
 08/11/2023   12:42:16   ( -73.27, 170.82) 08/11/2023   12:43:23  ( -73.28, 170.81)    1.86                67
 08/11/2023   13:33:02   (  73.22, -21.76) 08/11/2023   13:32:50  (  73.19, -21.75)    3.48                12