Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 4 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)
 04/25/2019   02:06:11   ( -70.64, -34.82) 04/25/2019   02:07:10  ( -70.63, -34.84)    1.22                59
 04/25/2019   02:56:55   (  70.53, 132.67) 04/25/2019   02:56:37  (  70.52, 132.65)    0.83                18
 04/25/2019   03:47:25   ( -69.84, -58.95) 04/25/2019   03:46:16  ( -69.92, -60.58)   62.98                69
 04/27/2019   18:22:39   ( -70.66,  81.03) 04/27/2019   18:23:37  ( -70.67,  81.11)    3.18                58
 04/27/2019   19:13:23   (  70.55,-111.48) 04/27/2019   19:13:04  (  70.56,-111.41)    3.00                19
 04/27/2019   20:03:53   ( -69.86,  56.90) 04/27/2019   20:02:44  ( -69.91,  55.28)   62.37                69
 04/30/2019   10:39:07   ( -70.68,-163.12) 04/30/2019   10:40:05  ( -70.66,-163.04)    3.46                58
 04/30/2019   11:29:50   (  70.51,   4.45) 04/30/2019   11:29:32  (  70.54,   4.43)    3.29                18
 04/30/2019   12:20:21   ( -69.88, 172.76) 04/30/2019   12:19:11  ( -69.95, 171.21)   59.55                70
 05/03/2019   02:55:33   ( -70.64, -47.18) 05/03/2019   02:56:32  ( -70.64, -47.19)    0.94                59
 05/03/2019   03:46:17   (  70.53, 120.30) 05/03/2019   03:45:59  (  70.52, 120.28)    2.10                18
 05/03/2019   04:36:47   ( -69.85, -71.31) 05/03/2019   04:35:38  ( -69.93, -72.94)   62.87                69
 05/05/2019   19:12:01   ( -70.66,  68.67) 05/05/2019   19:12:59  ( -70.66,  68.73)    2.32                58
 05/05/2019   20:02:45   (  70.56,-123.85) 05/05/2019   20:02:26  (  70.54,-123.81)    2.33                19