Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 2 1.  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)
 02/03/2020   02:31:19   ( -71.13, -42.08) 02/03/2020   02:32:28  ( -71.00, -40.39)   62.75                69
 02/03/2020   03:21:51   (  70.40, 126.43) 02/03/2020   03:22:04  (  70.41, 126.36)    3.28                13
 02/03/2020   04:12:33   ( -70.34, -66.16) 02/03/2020   04:11:33  ( -70.35, -66.09)    2.75                60
 02/05/2020   18:47:45   ( -71.23,  73.64) 02/05/2020   18:48:53  ( -71.11,  75.66)   73.81                68
 02/05/2020   19:38:16   (  70.46,-117.76) 02/05/2020   19:38:30  (  70.46,-117.69)    2.69                14
 02/05/2020   20:28:57   ( -70.34,  49.74) 02/05/2020   20:28:00  ( -70.35,  49.79)    1.95                57
 02/08/2020   11:04:12   ( -71.34,-170.64) 02/08/2020   11:05:19  ( -71.21,-168.30)   84.81                67
 02/08/2020   11:54:41   (  70.46,  -1.87) 02/08/2020   11:54:58  (  70.45,  -1.82)    2.00                17
 02/08/2020   12:45:22   ( -70.34, 165.64) 02/08/2020   12:44:28  ( -70.35, 165.66)    0.70                54
 02/11/2020   03:20:39   ( -71.44, -54.92) 02/11/2020   03:21:45  ( -71.31, -52.26)   95.68                66
 02/11/2020   04:11:06   (  70.47, 114.03) 02/11/2020   04:11:26  (  70.44, 114.04)    3.21                20
 02/11/2020   05:01:47   ( -70.34, -78.46) 02/11/2020   05:00:56  ( -70.33, -78.48)    1.06                51
 02/13/2020   20:27:31   (  70.47,-130.08) 02/13/2020   20:27:53  (  70.48,-130.02)    2.37                22
 02/13/2020   21:18:11   ( -70.34,  37.45) 02/13/2020   21:17:23  ( -70.32,  37.38)    3.34                48