Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 5 12.  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)
 05/13/2019   20:01:28   ( -70.94,  55.85) 05/13/2019   20:02:39  ( -70.82,  56.72)   34.46                71
 05/13/2019   20:52:06   (  70.51,-136.14) 05/13/2019   20:52:10  (  70.50,-136.13)    1.59                 4
 05/13/2019   21:42:47   ( -70.41,  31.34) 05/13/2019   21:41:40  ( -70.40,  31.35)    1.94                67
 05/16/2019   12:17:58   ( -71.07, 171.51) 05/16/2019   12:19:08  ( -70.96, 172.81)   48.56                70
 05/16/2019   13:08:33   (  70.49, -20.22) 05/16/2019   13:08:42  (  70.47, -20.29)    3.22                 9
 05/16/2019   13:59:14   ( -70.39, 147.27) 05/16/2019   13:58:12  ( -70.37, 147.20)    2.86                62
 05/19/2019   04:34:28   ( -71.20, -72.83) 05/19/2019   04:35:37  ( -71.12, -71.08)   63.71                69
 05/19/2019   05:25:01   (  70.52,  95.61) 05/19/2019   05:25:13  (  70.51,  95.64)    1.20                12
 05/19/2019   06:15:42   ( -70.41, -96.89) 05/19/2019   06:14:43  ( -70.42, -96.87)    1.32                59
 05/21/2019   20:50:58   ( -71.39,  42.74) 05/21/2019   20:52:05  ( -71.28,  45.06)   83.54                67
 05/21/2019   21:41:27   (  70.50,-148.47) 05/21/2019   21:41:44  (  70.51,-148.49)    1.65                17
 05/21/2019   22:32:09   ( -70.44,  18.94) 05/21/2019   22:31:14  ( -70.42,  19.01)    3.30                55
 05/24/2019   13:57:55   (  70.53, -32.64) 05/24/2019   13:58:16  (  70.52, -32.60)    1.96                21
 05/24/2019   14:48:36   ( -70.42, 134.86) 05/24/2019   14:47:46  ( -70.43, 134.90)    2.14                50