Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 9 15.  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   ( -70.66,  77.58) 09/16/2019   18:36:56  ( -70.58,  77.97)   16.91                72
 09/16/2019   19:26:25   (  70.38,-114.67) 09/16/2019   19:26:25  (  70.36,-114.71)    2.24                 0
 09/16/2019   20:17:06   ( -70.28,  52.80) 09/16/2019   20:15:55  ( -70.26,  52.77)    2.93                71
 09/19/2019   10:52:12   ( -70.79,-166.75) 09/19/2019   10:53:23  ( -70.71,-165.95)   30.50                71
 09/19/2019   11:42:51   (  70.41,   1.16) 09/19/2019   11:42:54  (  70.38,   1.20)    3.11                 3
 09/19/2019   12:33:31   ( -70.26, 168.73) 09/19/2019   12:32:24  ( -70.28, 168.69)    3.21                67
 09/22/2019   03:08:41   ( -70.92, -51.08) 09/22/2019   03:09:51  ( -70.85, -49.87)   45.04                70
 09/22/2019   03:59:17   (  70.39, 117.09) 09/22/2019   03:59:24  (  70.41, 117.12)    3.00                 7
 09/22/2019   04:49:58   ( -70.28, -75.43) 09/22/2019   04:48:54  ( -70.31, -75.39)    3.37                64
 09/24/2019   19:25:11   ( -71.10,  64.49) 09/24/2019   19:26:19  ( -70.99,  66.23)   64.00                68
 09/24/2019   20:15:43   (  70.37,-127.00) 09/24/2019   20:15:55  (  70.39,-127.03)    2.87                12
 09/24/2019   21:06:25   ( -70.31,  40.41) 09/24/2019   21:05:25  ( -70.29,  40.45)    2.75                60
 09/27/2019   11:41:40   ( -71.24,-179.85) 09/27/2019   11:42:47  ( -71.14,-177.66)   79.09                67
 09/27/2019   12:32:10   (  70.40, -11.16) 09/27/2019   12:32:26  (  70.37, -11.18)    3.27                16
 09/27/2019   13:22:51   ( -70.29, 156.34) 09/27/2019   13:21:56  ( -70.28, 156.30)    1.93                55