Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 4 21.  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)
 04/22/2019   09:49:44   ( -70.67,-150.75) 04/22/2019   09:50:42  ( -70.65,-150.69)    3.30                58
 04/22/2019   10:40:28   (  70.56,  16.74) 04/22/2019   10:40:09  (  70.54,  16.80)    3.07                19
 04/22/2019   11:30:58   ( -69.87,-174.88) 04/22/2019   11:29:48  ( -69.94,-176.44)   60.18                70
 04/25/2019   02:06:11   ( -70.63, -34.81) 04/25/2019   02:07:10  ( -70.64, -34.83)    0.90                59
 04/25/2019   02:56:55   (  70.52, 132.68) 04/25/2019   02:56:37  (  70.53, 132.66)    0.88                18
 04/25/2019   03:47:26   ( -69.89, -59.02) 04/25/2019   03:46:16  ( -69.93, -60.57)   59.56                70
 04/27/2019   18:22:39   ( -70.65,  81.05) 04/27/2019   18:23:38  ( -70.62,  81.03)    2.91                59
 04/27/2019   19:13:23   (  70.54,-111.47) 04/27/2019   19:13:05  (  70.51,-111.49)    3.51                18
 04/27/2019   20:03:53   ( -69.85,  56.91) 04/27/2019   20:02:44  ( -69.92,  55.29)   62.69                69
 04/30/2019   10:39:07   ( -70.67,-163.10) 04/30/2019   10:40:05  ( -70.66,-163.04)    2.63                58
 04/30/2019   11:29:51   (  70.56,   4.38) 04/30/2019   11:29:32  (  70.54,   4.44)    2.93                19
 04/30/2019   12:20:21   ( -69.87, 172.77) 04/30/2019   12:19:12  ( -69.90, 171.14)   62.35                69
 05/03/2019   02:55:33   ( -70.63, -47.17) 05/03/2019   02:56:32  ( -70.64, -47.19)    0.81                59
 05/03/2019   03:46:17   (  70.53, 120.31) 05/03/2019   03:45:59  (  70.52, 120.28)    1.75                18