Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 9 23.  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)
 09/24/2019   19:25:09   ( -71.01,  64.65) 09/24/2019   19:26:19  ( -70.89,  66.08)   53.35                70
 09/24/2019   20:15:44   (  70.42,-127.08) 09/24/2019   20:15:53  (  70.40,-127.01)    3.48                 9
 09/24/2019   21:06:24   ( -70.27,  40.48) 09/24/2019   21:05:23  ( -70.30,  40.46)    2.85                61
 09/27/2019   11:41:37   ( -71.15,-179.69) 09/27/2019   11:42:45  ( -71.04,-177.80)   69.12                68
 09/27/2019   12:32:09   (  70.41, -11.17) 09/27/2019   12:32:22  (  70.39, -11.15)    2.25                13
 09/27/2019   13:22:50   ( -70.31, 156.31) 09/27/2019   13:21:52  ( -70.29, 156.33)    2.09                58
 09/30/2019   03:58:06   ( -71.29, -64.05) 09/30/2019   03:59:13  ( -71.14, -61.77)   83.22                67
 09/30/2019   04:48:35   (  70.40, 104.73) 09/30/2019   04:48:52  (  70.38, 104.71)    2.46                17
 09/30/2019   05:39:16   ( -70.29, -87.77) 09/30/2019   05:38:22  ( -70.28, -87.81)    1.95                54
 10/02/2019   20:14:34   ( -71.38,  51.68) 10/02/2019   20:15:40  ( -71.29,  54.35)   95.33                66
 10/02/2019   21:05:01   (  70.40,-139.37) 10/02/2019   21:05:21  (  70.42,-139.35)    2.80                20
 10/02/2019   21:55:43   ( -70.33,  28.05) 10/02/2019   21:54:51  ( -70.32,  28.13)    3.26                52
 10/05/2019   13:21:27   (  70.39, -23.47) 10/05/2019   13:21:51  (  70.40, -23.50)    1.62                24
 10/05/2019   14:12:09   ( -70.32, 143.96) 10/05/2019   14:11:21  ( -70.30, 143.98)    2.50                48