Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2023 1 9.  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)
 01/09/2023   16:37:44   ( -72.85, 110.00) 01/09/2023   16:38:55  ( -72.77, 110.98)   33.34                71
 01/09/2023   17:28:23   (  72.47, -81.89) 01/09/2023   17:28:26  (  72.47, -81.95)    2.07                 3
 01/09/2023   18:19:07   ( -72.41,  85.53) 01/09/2023   18:17:55  ( -72.40,  85.56)    1.82                72
 01/12/2023   08:04:57   (  72.57,  58.79) 01/12/2023   08:05:59  (  72.54,  58.79)    3.39                62
 01/12/2023   08:55:40   ( -72.46,-133.67) 01/12/2023   08:55:28  ( -72.48,-133.69)    1.92                12
 01/12/2023   09:46:13   (  71.77,  34.99) 01/12/2023   09:45:06  (  71.79,  32.74)   78.39                67
 01/14/2023   23:32:13   ( -72.52,   7.12) 01/14/2023   23:33:01  ( -72.53,   7.02)    3.81                48
 01/15/2023   00:22:57   (  72.45, 174.57) 01/15/2023   00:22:27  (  72.43, 174.48)    3.34                30
 01/17/2023   14:59:30   (  72.51, -44.66) 01/17/2023   14:59:59  (  72.51, -44.76)    3.36                29
 01/17/2023   15:50:14   ( -72.44, 122.79) 01/17/2023   15:49:28  ( -72.46, 122.76)    1.80                46
 01/20/2023   05:36:14   (  73.14,  94.90) 01/20/2023   05:37:22  (  73.05,  96.87)   64.60                68
 01/20/2023   06:26:47   ( -72.51, -96.45) 01/20/2023   06:27:00  ( -72.51, -96.52)    2.43                13
 01/20/2023   07:17:32   (  72.45,  70.99) 01/20/2023   07:16:26  (  72.46,  71.03)    2.37                66
 01/22/2023   21:03:20   ( -72.58,  44.30) 01/22/2023   21:04:31  ( -72.60,  44.25)    2.36                71
 01/22/2023   21:54:05   (  72.53,-148.27) 01/22/2023   21:53:58  (  72.50,-148.30)    3.50                 7