Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 4 17.  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)
 04/19/2019   17:33:16   ( -70.63,  93.43) 04/19/2019   17:34:15  ( -70.63,  93.41)    1.08                59
 04/19/2019   18:24:00   (  70.53, -99.09) 04/19/2019   18:23:42  (  70.52, -99.11)    0.96                18
 04/19/2019   19:14:30   ( -69.84,  69.30) 04/19/2019   19:13:21  ( -69.92,  67.66)   63.27                69
 04/22/2019   09:49:44   ( -70.65,-150.72) 04/22/2019   09:50:43  ( -70.63,-150.72)    2.89                59
 04/22/2019   10:40:28   (  70.55,  16.76) 04/22/2019   10:40:10  (  70.52,  16.76)    3.54                18
 04/22/2019   11:30:58   ( -69.86,-174.85) 04/22/2019   11:29:49  ( -69.92,-176.46)   61.93                69
 04/25/2019   02:06:11   ( -70.63, -34.79) 04/25/2019   02:07:11  ( -70.62, -34.84)    1.84                60
 04/25/2019   02:56:55   (  70.52, 132.68) 04/25/2019   02:56:38  (  70.51, 132.63)    2.20                17
 04/25/2019   03:47:26   ( -69.88, -59.01) 04/25/2019   03:46:17  ( -69.92, -60.59)   60.59                69
 04/27/2019   18:22:38   ( -70.65,  81.04) 04/27/2019   18:23:37  ( -70.67,  81.11)    3.30                59
 04/27/2019   19:13:22   (  70.55,-111.48) 04/27/2019   19:13:04  (  70.56,-111.42)    2.26                18
 04/27/2019   20:03:53   ( -69.91,  56.83) 04/27/2019   20:02:43  ( -69.96,  55.36)   56.73                70
 04/30/2019   10:39:05   ( -70.63,-163.04) 04/30/2019   10:40:06  ( -70.61,-163.11)    3.53                61
 04/30/2019   11:29:49   (  70.52,   4.44) 04/30/2019   11:29:32  (  70.54,   4.44)    1.97                17