Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 5 6.  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)
 05/08/2019   11:28:28   ( -70.65,-175.44) 05/08/2019   11:29:40  ( -70.65,-175.30)    5.01                72
 05/08/2019   12:19:11   (  70.48,  -7.85) 05/08/2019   12:19:08  (  70.48,  -7.90)    1.77                 3
 05/08/2019   13:09:51   ( -70.33, 159.71) 05/08/2019   13:08:38  ( -70.38, 159.58)    7.37                73
 05/11/2019   03:44:58   ( -70.78, -59.76) 05/11/2019   03:46:10  ( -70.70, -59.34)   17.49                72
 05/11/2019   04:35:39   (  70.50, 107.99) 05/11/2019   04:35:39  (  70.48, 107.97)    2.98                 0
 05/11/2019   05:26:20   ( -70.40, -84.53) 05/11/2019   05:25:09  ( -70.38, -84.54)    2.64                71
 05/13/2019   20:01:28   ( -70.90,  55.92) 05/13/2019   20:02:39  ( -70.82,  56.71)   30.44                71
 05/13/2019   20:52:06   (  70.48,-136.08) 05/13/2019   20:52:10  (  70.48,-136.15)    2.62                 4
 05/13/2019   21:42:47   ( -70.37,  31.41) 05/13/2019   21:41:40  ( -70.39,  31.34)    3.02                67
 05/16/2019   12:17:57   ( -71.03, 171.59) 05/16/2019   12:19:07  ( -70.94, 172.78)   44.12                70
 05/16/2019   13:08:33   (  70.50, -20.24) 05/16/2019   13:08:40  (  70.50, -20.25)    0.55                 7
 05/16/2019   13:59:14   ( -70.39, 147.26) 05/16/2019   13:58:10  ( -70.40, 147.24)    1.50                64
 05/19/2019   04:34:27   ( -71.15, -72.74) 05/19/2019   04:35:36  ( -71.07, -71.14)   58.37                69
 05/19/2019   05:25:01   (  70.52,  95.60) 05/19/2019   05:25:11  (  70.52,  95.66)    2.13                10
 05/19/2019   06:15:42   ( -70.41, -96.90) 05/19/2019   06:14:41  ( -70.43, -96.85)    2.73                61