Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 2 2.  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   02:31:18   ( -71.12, -42.06) 02/03/2020   02:32:27  ( -71.02, -40.37)   62.02                69
 02/03/2020   03:21:51   (  70.44, 126.37) 02/03/2020   03:22:03  (  70.43, 126.38)    0.96                12
 02/03/2020   04:12:32   ( -70.33, -66.14) 02/03/2020   04:11:33  ( -70.31, -66.15)    1.81                59
 02/05/2020   18:47:45   ( -71.22,  73.66) 02/05/2020   18:48:53  ( -71.13,  75.68)   73.21                68
 02/05/2020   19:38:16   (  70.44,-117.73) 02/05/2020   19:38:31  (  70.42,-117.75)    2.11                15
 02/05/2020   20:28:57   ( -70.33,  49.76) 02/05/2020   20:28:01  ( -70.31,  49.73)    2.28                56
 02/08/2020   11:04:12   ( -71.32,-170.61) 02/08/2020   11:05:19  ( -71.23,-168.27)   84.29                67
 02/08/2020   11:54:41   (  70.45,  -1.84) 02/08/2020   11:54:58  (  70.47,  -1.80)    2.98                17
 02/08/2020   12:45:22   ( -70.33, 165.67) 02/08/2020   12:44:29  ( -70.31, 165.60)    3.42                53
 02/11/2020   03:20:39   ( -71.43, -54.90) 02/11/2020   03:21:45  ( -71.33, -52.23)   95.22                66
 02/11/2020   04:11:05   (  70.45, 114.05) 02/11/2020   04:11:25  (  70.46, 114.07)    0.75                20
 02/11/2020   05:01:46   ( -70.33, -78.43) 02/11/2020   05:00:55  ( -70.35, -78.45)    2.77                51
 02/13/2020   20:27:30   (  70.46,-130.06) 02/13/2020   20:27:53  (  70.44,-130.08)    2.31                23
 02/13/2020   21:18:11   ( -70.33,  37.47) 02/13/2020   21:17:23  ( -70.34,  37.41)    2.56                48