Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 1 30.  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)
 01/31/2020   10:14:51   ( -71.01,-157.78) 01/31/2020   10:16:01  ( -70.91,-156.41)   50.82                70
 01/31/2020   11:05:26   (  70.43,  10.49) 01/31/2020   11:05:35  (  70.43,  10.50)    0.66                 9
 01/31/2020   11:56:07   ( -70.33, 177.97) 01/31/2020   11:55:05  ( -70.31, 177.97)    1.40                62
 02/03/2020   02:31:18   ( -71.11, -42.05) 02/03/2020   02:32:27  ( -71.02, -40.36)   62.03                69
 02/03/2020   03:21:51   (  70.43, 126.38) 02/03/2020   03:22:03  (  70.43, 126.38)    0.84                12
 02/03/2020   04:12:32   ( -70.33, -66.13) 02/03/2020   04:11:33  ( -70.32, -66.15)    1.24                59
 02/05/2020   18:47:45   ( -71.22,  73.67) 02/05/2020   18:48:53  ( -71.13,  75.69)   73.18                68
 02/05/2020   19:38:16   (  70.44,-117.73) 02/05/2020   19:38:31  (  70.42,-117.75)    2.24                15
 02/05/2020   20:28:57   ( -70.33,  49.77) 02/05/2020   20:28:01  ( -70.31,  49.73)    2.04                56
 02/08/2020   11:04:12   ( -71.32,-170.61) 02/08/2020   11:05:19  ( -71.23,-168.27)   84.17                67
 02/08/2020   11:54:41   (  70.45,  -1.84) 02/08/2020   11:54:58  (  70.46,  -1.80)    2.53                17
 02/08/2020   12:45:22   ( -70.33, 165.67) 02/08/2020   12:44:29  ( -70.30, 165.60)    3.52                53
 02/11/2020   03:20:38   ( -71.42, -54.89) 02/11/2020   03:21:44  ( -71.32, -52.24)   94.98                66
 02/11/2020   04:11:05   (  70.45, 114.05) 02/11/2020   04:11:25  (  70.45, 114.06)    0.48                20
 02/11/2020   05:01:46   ( -70.32, -78.43) 02/11/2020   05:00:55  ( -70.34, -78.46)    2.49                51