Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 9 6.  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)
 09/08/2019   17:46:22   ( -70.50,  90.17) 09/08/2019   17:47:26  ( -70.50,  90.24)    2.69                64
 09/08/2019   18:37:06   (  70.38,-102.33) 09/08/2019   18:36:53  (  70.40,-102.28)    3.27                13
 09/08/2019   19:27:40   ( -69.91,  65.70) 09/08/2019   19:26:29  ( -69.96,  64.73)   37.58                71
 09/11/2019   10:02:48   ( -70.47,-153.90) 09/11/2019   10:03:56  ( -70.47,-153.93)    1.09                68
 09/11/2019   10:53:32   (  70.35,  13.59) 09/11/2019   10:53:23  (  70.36,  13.55)    1.84                 9
 09/11/2019   11:44:09   ( -70.04,-178.61) 09/11/2019   11:42:56  ( -70.09,-179.20)   23.23                73
 09/14/2019   02:19:15   ( -70.50, -38.06) 09/14/2019   02:20:25  ( -70.49, -38.02)    1.55                70
 09/14/2019   03:09:58   (  70.38, 129.43) 09/14/2019   03:09:51  (  70.38, 129.46)    1.09                 7
 09/14/2019   04:00:36   ( -70.12, -62.84) 09/14/2019   03:59:23  ( -70.17, -63.22)   14.92                73
 09/16/2019   18:35:41   ( -70.53,  77.78) 09/16/2019   18:36:53  ( -70.51,  77.88)    4.30                72
 09/16/2019   19:26:24   (  70.36,-114.65) 09/16/2019   19:26:20  (  70.39,-114.64)    3.42                 4
 09/16/2019   20:17:04   ( -70.20,  52.92) 09/16/2019   20:15:51  ( -70.24,  52.77)    6.83                73
 09/19/2019   10:52:09   ( -70.61,-166.46) 09/19/2019   10:53:21  ( -70.57,-166.14)   12.64                72
 09/19/2019   11:42:51   (  70.39,   1.19) 09/19/2019   11:42:49  (  70.40,   1.26)    2.73                 2
 09/19/2019   12:33:32   ( -70.29, 168.68) 09/19/2019   12:32:19  ( -70.30, 168.74)    3.21                73