Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 9 8.  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,  90.16) 09/08/2019   17:47:27  ( -70.48,  90.20)    2.45                65
 09/08/2019   18:37:06   (  70.38,-102.34) 09/08/2019   18:36:54  (  70.38,-102.31)    1.01                12
 09/08/2019   19:27:41   ( -69.97,  65.62) 09/08/2019   19:26:29  ( -69.99,  64.77)   32.37                72
 09/11/2019   10:02:48   ( -70.47,-153.91) 09/11/2019   10:03:57  ( -70.48,-153.93)    0.91                69
 09/11/2019   10:53:32   (  70.36,  13.59) 09/11/2019   10:53:24  (  70.37,  13.56)    2.18                 8
 09/11/2019   11:44:09   ( -70.05,-178.62) 09/11/2019   11:42:57  ( -70.10,-179.20)   22.87                72
 09/14/2019   02:19:15   ( -70.50, -38.07) 09/14/2019   02:20:27  ( -70.49, -38.04)    2.10                72
 09/14/2019   03:09:59   (  70.39, 129.42) 09/14/2019   03:09:54  (  70.38, 129.44)    1.35                 5
 09/14/2019   04:00:38   ( -70.18, -62.93) 09/14/2019   03:59:25  ( -70.22, -63.15)    9.32                73
 09/16/2019   18:35:43   ( -70.64,  77.60) 09/16/2019   18:36:55  ( -70.55,  77.94)   15.46                72
 09/16/2019   19:26:24   (  70.37,-114.66) 09/16/2019   19:26:23  (  70.39,-114.66)    2.13                 1
 09/16/2019   20:17:05   ( -70.26,  52.83) 09/16/2019   20:15:53  ( -70.28,  52.82)    2.54                72
 09/19/2019   10:52:12   ( -70.77,-166.73) 09/19/2019   10:53:23  ( -70.68,-166.00)   28.81                71
 09/19/2019   11:42:51   (  70.40,   1.18) 09/19/2019   11:42:53  (  70.40,   1.24)    2.17                 2
 09/19/2019   12:33:32   ( -70.29, 168.67) 09/19/2019   12:32:23  ( -70.30, 168.72)    2.37                69