Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 4 16.  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)
 04/17/2019   01:16:49   ( -70.63, -22.45) 04/17/2019   01:17:48  ( -70.61, -22.50)    3.23                59
 04/17/2019   02:07:33   (  70.53, 145.02) 04/17/2019   02:07:15  (  70.51, 144.99)    2.83                18
 04/17/2019   02:58:03   ( -69.84, -46.58) 04/17/2019   02:56:54  ( -69.90, -48.24)   63.93                69
 04/19/2019   17:33:17   ( -70.65,  93.40) 04/19/2019   17:34:15  ( -70.67,  93.46)    2.97                58
 04/19/2019   18:24:01   (  70.55, -99.12) 04/19/2019   18:23:42  (  70.56, -99.05)    3.07                19
 04/19/2019   19:14:30   ( -69.85,  69.27) 04/19/2019   19:13:21  ( -69.91,  67.64)   62.65                69
 04/22/2019   09:49:43   ( -70.62,-150.67) 04/22/2019   09:50:43  ( -70.61,-150.74)    2.70                60
 04/22/2019   10:40:27   (  70.52,  16.81) 04/22/2019   10:40:10  (  70.50,  16.74)    2.90                17
 04/22/2019   11:30:58   ( -69.88,-174.88) 04/22/2019   11:29:49  ( -69.91,-176.48)   61.31                69
 04/25/2019   02:06:11   ( -70.64, -34.83) 04/25/2019   02:07:10  ( -70.67, -34.78)    2.89                59
 04/25/2019   02:56:55   (  70.54, 132.65) 04/25/2019   02:56:37  (  70.55, 132.69)    1.94                18
 04/25/2019   03:47:26   ( -69.90, -59.04) 04/25/2019   03:46:16  ( -69.96, -60.53)   57.38                70
 04/27/2019   18:22:39   ( -70.67,  81.01) 04/27/2019   18:23:38  ( -70.66,  81.09)    3.17                59
 04/27/2019   19:13:22   (  70.52,-111.43) 04/27/2019   19:13:05  (  70.54,-111.44)    2.89                17
 04/27/2019   20:03:54   ( -69.93,  56.80) 04/27/2019   20:02:44  ( -69.95,  55.34)   55.84                70
 04/30/2019   10:39:06   ( -70.65,-163.07) 04/30/2019   10:40:06  ( -70.65,-163.05)    1.05                60
 04/30/2019   11:29:49   (  70.55,   4.40) 04/30/2019   11:29:32  (  70.53,   4.42)    2.10                17