Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 9 14.  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)
 09/16/2019   18:35:44   ( -70.69,  77.52) 09/16/2019   18:36:55  ( -70.62,  78.03)   20.02                71
 09/16/2019   19:26:25   (  70.41,-114.72) 09/16/2019   19:26:24  (  70.40,-114.65)    2.96                 1
 09/16/2019   20:17:05   ( -70.26,  52.83) 09/16/2019   20:15:55  ( -70.25,  52.76)    3.31                70
 09/19/2019   10:52:13   ( -70.82,-166.81) 09/19/2019   10:53:24  ( -70.72,-165.95)   33.40                71
 09/19/2019   11:42:51   (  70.39,   1.20) 09/19/2019   11:42:55  (  70.39,   1.21)    0.47                 4
 09/19/2019   12:33:32   ( -70.29, 168.68) 09/19/2019   12:32:25  ( -70.29, 168.69)    0.66                67
 09/22/2019   03:08:42   ( -70.95, -51.14) 09/22/2019   03:09:52  ( -70.88, -49.83)   48.48                70
 09/22/2019   03:59:17   (  70.37, 117.11) 09/22/2019   03:59:26  (  70.39, 117.08)    2.19                 9
 09/22/2019   04:49:58   ( -70.27, -75.40) 09/22/2019   04:48:56  ( -70.29, -75.44)    2.68                62
 09/24/2019   19:25:11   ( -71.14,  64.43) 09/24/2019   19:26:19  ( -71.05,  66.31)   68.49                68
 09/24/2019   20:15:43   (  70.41,-127.05) 09/24/2019   20:15:56  (  70.39,-127.04)    1.56                13
 09/24/2019   21:06:24   ( -70.30,  40.44) 09/24/2019   21:05:26  ( -70.29,  40.45)    0.42                58
 09/27/2019   11:41:41   ( -71.33, 180.00) 09/27/2019   11:42:47  ( -71.23,-177.53)   88.93                66
 09/27/2019   12:32:09   (  70.39, -11.14) 09/27/2019   12:32:27  (  70.41, -11.14)    2.18                18
 09/27/2019   13:22:51   ( -70.33, 156.28) 09/27/2019   13:21:57  ( -70.31, 156.35)    3.13                54