Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 5 11.  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)
 05/11/2019   04:35:39   (  70.52, 107.96) 05/11/2019   04:35:39  (  70.50, 108.00)    2.62                 0
 05/11/2019   05:26:19   ( -70.37, -84.48) 05/11/2019   05:25:09  ( -70.40, -84.52)    3.06                70
 05/13/2019   20:01:28   ( -70.93,  55.88) 05/13/2019   20:02:39  ( -70.86,  56.77)   33.42                71
 05/13/2019   20:52:06   (  70.49,-136.11) 05/13/2019   20:52:11  (  70.48,-136.16)    2.64                 5
 05/13/2019   21:42:47   ( -70.39,  31.37) 05/13/2019   21:41:41  ( -70.38,  31.32)    2.67                66
 05/16/2019   12:17:59   ( -71.10, 171.46) 05/16/2019   12:19:09  ( -70.96, 172.80)   51.18                70
 05/16/2019   13:08:34   (  70.52, -20.27) 05/16/2019   13:08:42  (  70.52, -20.22)    1.97                 8
 05/16/2019   13:59:15   ( -70.42, 147.21) 05/16/2019   13:58:12  ( -70.43, 147.27)    2.26                63
 05/19/2019   04:34:29   ( -71.28, -72.97) 05/19/2019   04:35:37  ( -71.13, -71.05)   70.53                68
 05/19/2019   05:25:00   (  70.49,  95.65) 05/19/2019   05:25:14  (  70.48,  95.58)    3.18                14
 05/19/2019   06:15:41   ( -70.39, -96.86) 05/19/2019   06:14:44  ( -70.38, -96.92)    2.57                57
 05/21/2019   20:50:59   ( -71.41,  42.70) 05/21/2019   20:52:06  ( -71.32,  45.12)   86.75                67
 05/21/2019   21:41:28   (  70.52,-148.51) 05/21/2019   21:41:46  (  70.50,-148.51)    2.21                18
 05/21/2019   22:32:09   ( -70.41,  18.99) 05/21/2019   22:31:16  ( -70.41,  18.99)    0.15                53
 05/24/2019   13:57:55   (  70.50, -32.59) 05/24/2019   13:58:19  (  70.49, -32.66)    2.90                24
 05/24/2019   14:48:36   ( -70.38, 134.92) 05/24/2019   14:47:49  ( -70.40, 134.84)    3.53                47