Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 9 5.  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)
 09/06/2019   01:29:56   ( -70.51, -25.74) 09/06/2019   01:30:57  ( -70.49, -25.66)    3.23                61
 09/06/2019   02:20:40   (  70.39, 141.76) 09/06/2019   02:20:24  (  70.39, 141.83)    2.41                16
 09/06/2019   03:11:12   ( -69.82, -50.04) 09/06/2019   03:10:01  ( -69.89, -51.25)   46.89                71
 09/08/2019   17:46:22   ( -70.48,  90.20) 09/08/2019   17:47:27  ( -70.46,  90.17)    2.28                65
 09/08/2019   18:37:06   (  70.36,-102.31) 09/08/2019   18:36:54  (  70.35,-102.34)    1.60                12
 09/08/2019   19:27:40   ( -69.89,  65.73) 09/08/2019   19:26:29  ( -69.97,  64.74)   38.78                71
 09/11/2019   10:02:49   ( -70.50,-153.95) 09/11/2019   10:03:56  ( -70.48,-153.92)    2.65                67
 09/11/2019   10:53:33   (  70.38,  13.54) 09/11/2019   10:53:23  (  70.37,  13.56)    1.78                10
 09/11/2019   11:44:08   ( -70.02,-178.57) 09/11/2019   11:42:56  ( -70.04,-179.27)   26.69                72
 09/14/2019   02:19:14   ( -70.47, -38.01) 09/14/2019   02:20:24  ( -70.49, -38.02)    2.41                70
 09/14/2019   03:09:58   (  70.35, 129.47) 09/14/2019   03:09:51  (  70.38, 129.46)    2.73                 7
 09/14/2019   04:00:36   ( -70.09, -62.80) 09/14/2019   03:59:23  ( -70.17, -63.22)   17.68                73
 09/16/2019   18:35:41   ( -70.49,  77.84) 09/16/2019   18:36:53  ( -70.50,  77.87)    1.64                72
 09/16/2019   19:26:25   (  70.38,-114.68) 09/16/2019   19:26:20  (  70.38,-114.65)    1.25                 5
 09/16/2019   20:17:04   ( -70.17,  52.97) 09/16/2019   20:15:51  ( -70.23,  52.76)   10.59                73