Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 5 3.  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)
 05/05/2019   19:12:00   ( -70.62,  68.74) 05/05/2019   19:13:12  ( -70.61,  68.71)    1.03                72
 05/05/2019   20:02:44   (  70.50,-123.76) 05/05/2019   20:02:39  (  70.51,-123.80)    1.56                 5
 05/05/2019   20:53:23   ( -70.29,  43.88) 05/05/2019   20:52:10  ( -70.35,  43.60)   12.26                73
 05/08/2019   11:28:31   ( -70.80,-175.68) 05/08/2019   11:29:43  ( -70.71,-175.28)   17.73                72
 05/08/2019   12:19:12   (  70.53,  -7.93) 05/08/2019   12:19:11  (  70.55,  -7.88)    2.77                 1
 05/08/2019   13:09:53   ( -70.43, 159.56) 05/08/2019   13:08:41  ( -70.45, 159.61)    3.27                72
 05/11/2019   03:45:02   ( -71.04, -60.19) 05/11/2019   03:46:12  ( -70.91, -59.11)   41.60                70
 05/11/2019   04:35:38   (  70.51, 107.99) 05/11/2019   04:35:44  (  70.53, 107.95)    2.38                 6
 05/11/2019   05:26:20   ( -70.45, -84.61) 05/11/2019   05:25:14  ( -70.43, -84.56)    3.18                66
 05/13/2019   20:01:34   ( -71.27,  55.29) 05/13/2019   20:02:42  ( -71.15,  57.13)   67.45                68
 05/13/2019   20:52:06   (  70.54,-136.18) 05/13/2019   20:52:18  (  70.55,-136.15)    1.68                12
 05/13/2019   21:42:47   ( -70.43,  31.31) 05/13/2019   21:41:48  ( -70.46,  31.34)    3.20                59
 05/16/2019   12:18:06   ( -71.51, 170.75) 05/16/2019   12:19:12  ( -71.44, 173.45)   95.94                66
 05/16/2019   13:08:33   (  70.53, -20.28) 05/16/2019   13:08:54  (  70.52, -20.35)    2.92                21
 05/16/2019   13:59:14   ( -70.41, 147.22) 05/16/2019   13:58:24  ( -70.42, 147.15)    3.18                50