Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 4 20.  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   ( -70.64,-150.70) 04/22/2019   09:50:43  ( -70.62,-150.73)    2.53                59
 04/22/2019   10:40:28   (  70.53,  16.78) 04/22/2019   10:40:10  (  70.52,  16.76)    2.18                18
 04/22/2019   11:30:58   ( -69.84,-174.84) 04/22/2019   11:29:49  ( -69.91,-176.47)   63.19                69
 04/25/2019   02:06:12   ( -70.66, -34.85) 04/25/2019   02:07:10  ( -70.67, -34.78)    2.62                58
 04/25/2019   02:56:56   (  70.55, 132.64) 04/25/2019   02:56:37  (  70.56, 132.70)    2.52                19
 04/25/2019   03:47:26   ( -69.86, -58.98) 04/25/2019   03:46:17  ( -69.90, -60.61)   62.57                69
 04/27/2019   18:22:39   ( -70.67,  81.01) 04/27/2019   18:23:37  ( -70.65,  81.08)    3.41                58
 04/27/2019   19:13:22   (  70.51,-111.43) 04/27/2019   19:13:04  (  70.54,-111.45)    3.00                18
 04/27/2019   20:03:53   ( -69.88,  56.88) 04/27/2019   20:02:43  ( -69.95,  55.33)   59.68                70
 04/30/2019   10:39:06   ( -70.64,-163.06) 04/30/2019   10:40:05  ( -70.64,-163.07)    0.64                59
 04/30/2019   11:29:50   (  70.53,   4.42) 04/30/2019   11:29:32  (  70.52,   4.40)    1.77                18
 04/30/2019   12:20:20   ( -69.84, 172.81) 04/30/2019   12:19:11  ( -69.93, 171.18)   62.98                69
 05/03/2019   02:55:34   ( -70.66, -47.21) 05/03/2019   02:56:32  ( -70.67, -47.14)    2.58                58
 05/03/2019   03:46:18   (  70.55, 120.27) 05/03/2019   03:45:59  (  70.55, 120.32)    2.07                19