Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2023 5 29.  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)
 05/29/2023   13:43:30   ( -73.07, 154.88) 05/29/2023   13:44:42  ( -73.08, 154.93)    1.95                72
 05/29/2023   14:34:15   (  73.01, -37.67) 05/29/2023   14:34:09  (  72.99, -37.59)    3.19                 6
 05/29/2023   15:24:54   ( -72.70, 130.30) 05/29/2023   15:23:42  ( -72.71, 129.50)   26.56                72
 06/01/2023   05:10:35   (  73.04, 103.20) 06/01/2023   05:11:43  (  73.03, 103.09)    3.60                68
 06/01/2023   06:01:19   ( -72.98, -89.36) 06/01/2023   06:01:12  ( -72.96, -89.40)    2.61                 7
 06/01/2023   06:51:55   (  72.47,  79.03) 06/01/2023   06:50:46  (  72.50,  77.36)   56.22                69
 06/03/2023   20:37:41   ( -73.07,  51.40) 06/03/2023   20:38:45  ( -73.09,  51.46)    2.79                64
 06/03/2023   21:28:25   (  72.97,-141.07) 06/03/2023   21:28:12  (  73.00,-141.08)    3.59                13
 06/03/2023   22:18:59   ( -72.40,  27.44) 06/03/2023   22:17:50  ( -72.46,  25.52)   64.88                69
 06/06/2023   12:04:47   (  73.07,  -0.33) 06/06/2023   12:05:46  (  73.05,  -0.36)    1.88                59
 06/06/2023   12:55:31   ( -73.00, 167.13) 06/06/2023   12:55:15  ( -72.99, 167.15)    1.10                16
 06/06/2023   13:46:00   (  72.14, -23.78) 06/06/2023   13:44:55  (  72.21, -26.69)   99.54                65
 06/09/2023   03:31:52   ( -73.05, -52.03) 06/09/2023   03:32:48  ( -73.08, -52.06)    3.28                56
 06/09/2023   04:22:37   (  73.00, 115.38) 06/09/2023   04:22:15  (  72.99, 115.39)    2.15                22
 06/11/2023   18:58:57   (  73.07,-103.80) 06/11/2023   18:59:47  (  73.05,-103.86)    2.31                50
 06/11/2023   19:49:41   ( -72.99,  63.67) 06/11/2023   19:49:16  ( -73.00,  63.66)    0.44                25