Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2023 5 21.  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)
 05/21/2023   15:22:19   (  73.38, -50.60) 05/21/2023   15:23:29  (  73.27, -49.40)   40.31                70
 05/21/2023   16:12:56   ( -72.97, 117.61) 05/21/2023   16:13:02  ( -72.99, 117.68)    2.94                 6
 05/21/2023   17:03:40   (  72.91, -74.94) 05/21/2023   17:02:28  (  72.91, -74.85)    2.86                72
 05/24/2023   06:49:23   ( -73.34,-102.25) 05/24/2023   06:50:34  ( -73.20,-101.31)   33.83                71
 05/24/2023   07:40:02   (  72.98,  65.86) 05/24/2023   07:40:04  (  72.95,  65.84)    2.99                 2
 05/24/2023   08:30:45   ( -72.87,-126.59) 05/24/2023   08:29:33  ( -72.89,-126.65)    2.84                72
 05/26/2023   22:16:26   (  73.15,-153.57) 05/26/2023   22:17:38  (  73.08,-153.31)   12.23                72
 05/26/2023   23:07:08   ( -72.99,  14.10) 05/26/2023   23:07:08  ( -72.96,  14.10)    3.28                 0
 05/26/2023   23:57:49   (  72.73,-178.04) 05/26/2023   23:56:37  (  72.76,-178.64)   20.24                72
 05/29/2023   13:43:30   ( -73.07, 154.88) 05/29/2023   13:44:42  ( -73.06, 154.91)    1.26                72
 05/29/2023   14:34:14   (  72.97, -37.59) 05/29/2023   14:34:09  (  72.97, -37.63)    1.46                 5
 05/29/2023   15:24:53   ( -72.65, 130.40) 05/29/2023   15:23:41  ( -72.75, 129.58)   29.53                72
 06/01/2023   05:10:36   (  73.06, 103.16) 06/01/2023   05:11:43  (  73.04, 103.12)    2.02                67
 06/01/2023   06:01:20   ( -72.99, -89.37) 06/01/2023   06:01:12  ( -72.99, -89.36)    0.41                 8
 06/01/2023   06:51:55   (  72.43,  79.11) 06/01/2023   06:50:46  (  72.52,  77.38)   58.46                69
 06/03/2023   20:37:41   ( -73.08,  51.38) 06/03/2023   20:38:44  ( -73.09,  51.46)    2.98                63
 06/03/2023   21:28:25   (  72.99,-141.10) 06/03/2023   21:28:11  (  72.99,-141.09)    0.79                14