Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2023 6 22.  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)
 06/22/2023   07:57:28   ( -73.63,-119.52) 06/22/2023   07:58:36  ( -73.53,-117.59)   61.56                68
 06/22/2023   08:48:03   (  73.06,  49.09) 06/22/2023   08:48:10  (  73.08,  49.13)    2.99                 7
 06/22/2023   09:38:47   ( -73.01,-143.48) 06/22/2023   09:37:39  ( -73.01,-143.38)    3.28                68
 06/24/2023   23:24:32   (  73.30,-170.51) 06/24/2023   23:25:43  (  73.21,-170.02)   19.23                71
 06/25/2023   00:15:12   ( -73.05,  -2.64) 06/25/2023   00:15:13  ( -73.08,  -2.63)    3.20                 1
 06/25/2023   01:05:54   (  72.83, 165.16) 06/25/2023   01:04:42  (  72.89, 164.63)   18.52                72
 06/27/2023   14:51:38   ( -73.15, 138.08) 06/27/2023   14:52:47  ( -73.13, 138.07)    2.66                69
 06/27/2023   15:42:23   (  73.08, -54.45) 06/27/2023   15:42:13  (  73.09, -54.35)    3.56                10
 06/27/2023   16:32:59   ( -72.63, 113.83) 06/27/2023   16:31:49  ( -72.66, 112.43)   46.70                70
 06/30/2023   06:18:48   (  73.13,  86.36) 06/30/2023   06:19:47  (  73.11,  86.30)    3.04                59
 06/30/2023   07:09:31   ( -73.03,-106.10) 06/30/2023   07:09:16  ( -73.05,-106.20)    3.39                15
 07/02/2023   21:45:57   ( -73.15,  34.58) 07/02/2023   21:46:48  ( -73.15,  34.63)    1.50                51
 07/02/2023   22:36:42   (  73.07,-157.94) 07/02/2023   22:36:15  (  73.06,-157.92)    1.52                27
 07/05/2023   13:13:06   (  73.14, -17.15) 07/05/2023   13:13:46  (  73.14, -17.14)    0.34                40
 07/05/2023   14:03:49   ( -73.04, 150.37) 07/05/2023   14:03:15  ( -73.08, 150.37)    3.79                34