Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 4 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)
 04/30/2019   10:39:06   ( -70.64,-163.05) 04/30/2019   10:40:10  ( -70.63,-163.06)    1.19                64
 04/30/2019   11:29:50   (  70.52,   4.45) 04/30/2019   11:29:37  (  70.52,   4.43)    0.57                13
 04/30/2019   12:20:24   ( -70.05, 172.50) 04/30/2019   12:19:13  ( -70.09, 171.43)   40.45                71
 05/03/2019   02:55:34   ( -70.66, -47.20) 05/03/2019   02:56:41  ( -70.64, -47.16)    1.93                67
 05/03/2019   03:46:18   (  70.54, 120.29) 05/03/2019   03:46:08  (  70.54, 120.32)    1.10                10
 05/03/2019   04:36:54   ( -70.17, -71.81) 05/03/2019   04:35:42  ( -70.22, -72.51)   26.78                72
 05/05/2019   19:12:01   ( -70.67,  68.65) 05/05/2019   19:13:12  ( -70.66,  68.73)    3.35                71
 05/05/2019   20:02:45   (  70.56,-123.86) 05/05/2019   20:02:39  (  70.55,-123.79)    2.75                 6
 05/05/2019   20:53:24   ( -70.35,  43.79) 05/05/2019   20:52:10  ( -70.40,  43.61)    8.40                74
 05/08/2019   11:28:32   ( -70.85,-175.76) 05/08/2019   11:29:43  ( -70.78,-175.23)   21.01                71
 05/08/2019   12:19:12   (  70.53,  -7.93) 05/08/2019   12:19:12  (  70.56,  -7.92)    3.39                 0
 05/08/2019   13:09:53   ( -70.42, 159.56) 05/08/2019   13:08:43  ( -70.41, 159.50)    2.71                70
 05/11/2019   03:45:04   ( -71.08, -60.27) 05/11/2019   03:46:14  ( -70.96, -59.11)   44.32                70
 05/11/2019   04:35:40   (  70.56, 107.91) 05/11/2019   04:35:46  (  70.57, 107.95)    2.27                 6
 05/11/2019   05:26:21   ( -70.45, -84.60) 05/11/2019   05:25:17  ( -70.42, -84.63)    2.88                64
 05/13/2019   20:01:36   ( -71.31,  55.22) 05/13/2019   20:02:44  ( -71.23,  57.19)   70.82                68
 05/13/2019   20:52:08   (  70.58,-136.25) 05/13/2019   20:52:21  (  70.58,-136.19)    2.49                13
 05/13/2019   21:42:49   ( -70.47,  31.25) 05/13/2019   21:41:51  ( -70.49,  31.31)    3.05                58