Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2023 5 20.  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   (  73.40, -50.66) 05/21/2023   15:23:29  (  73.25, -49.44)   42.17                70
 05/21/2023   16:12:55   ( -72.94, 117.67) 05/21/2023   16:13:02  ( -72.97, 117.64)    3.30                 7
 05/21/2023   17:03:40   (  72.88, -74.88) 05/21/2023   17:02:29  (  72.89, -74.89)    0.93                71
 05/24/2023   06:49:23   ( -73.31,-102.18) 05/24/2023   06:50:34  ( -73.23,-101.23)   31.37                71
 05/24/2023   07:40:03   (  73.00,  65.82) 05/24/2023   07:40:04  (  72.99,  65.91)    3.30                 1
 05/24/2023   08:30:46   ( -72.89,-126.63) 05/24/2023   08:29:34  ( -72.87,-126.68)    2.27                72
 05/26/2023   22:16:26   (  73.17,-153.62) 05/26/2023   22:17:37  (  73.12,-153.21)   14.14                71
 05/26/2023   23:07:07   ( -72.96,  14.17) 05/26/2023   23:07:08  ( -72.96,  14.09)    2.53                 1
 05/26/2023   23:57:49   (  72.75,-178.08) 05/26/2023   23:56:36  (  72.81,-178.55)   16.92                73
 05/29/2023   13:43:30   ( -73.08, 154.84) 05/29/2023   13:44:42  ( -73.07, 154.92)    3.00                72
 05/29/2023   14:34:14   (  72.98, -37.63) 05/29/2023   14:34:09  (  72.98, -37.62)    0.78                 5
 05/29/2023   15:24:53   ( -72.66, 130.37) 05/29/2023   15:23:41  ( -72.76, 129.59)   27.80                72
 06/01/2023   05:10:36   (  73.07, 103.14) 06/01/2023   05:11:43  (  73.07, 103.17)    1.10                67
 06/01/2023   06:01:20   ( -73.00, -89.40) 06/01/2023   06:01:12  ( -73.01, -89.31)    3.13                 8