Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2019 4 22.  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   ( -70.65,-150.72) 04/22/2019   09:50:42  ( -70.66,-150.67)    2.21                58
 04/22/2019   10:40:28   (  70.54,  16.76) 04/22/2019   10:40:09  (  70.56,  16.82)    2.87                19
 04/22/2019   11:30:58   ( -69.86,-174.85) 04/22/2019   11:29:49  ( -69.90,-176.49)   62.97                69
 04/25/2019   02:06:12   ( -70.67, -34.87) 04/25/2019   02:07:10  ( -70.65, -34.80)    2.93                58
 04/25/2019   02:56:56   (  70.56, 132.62) 04/25/2019   02:56:37  (  70.55, 132.68)    2.79                19
 04/25/2019   03:47:26   ( -69.87, -59.00) 04/25/2019   03:46:16  ( -69.95, -60.55)   59.96                70
 04/27/2019   18:22:39   ( -70.63,  81.07) 04/27/2019   18:23:38  ( -70.64,  81.06)    0.85                59
 04/27/2019   19:13:23   (  70.53,-111.45) 04/27/2019   19:13:05  (  70.53,-111.46)    0.79                18
 04/27/2019   20:03:53   ( -69.89,  56.86) 04/27/2019   20:02:43  ( -69.93,  55.31)   59.37                70
 04/30/2019   10:39:06   ( -70.65,-163.08) 04/30/2019   10:40:05  ( -70.62,-163.09)    3.47                59
 04/30/2019   11:29:50   (  70.55,   4.40) 04/30/2019   11:29:31  (  70.56,   4.46)    2.94                19
 04/30/2019   12:20:20   ( -69.86, 172.79) 04/30/2019   12:19:11  ( -69.91, 171.16)   62.56                69
 05/03/2019   02:55:34   ( -70.67, -47.23) 05/03/2019   02:56:32  ( -70.65, -47.17)    3.27                58
 05/03/2019   03:46:17   (  70.51, 120.33) 05/03/2019   03:45:59  (  70.54, 120.30)    2.59                18
 05/03/2019   04:36:48   ( -69.88, -71.36) 05/03/2019   04:35:38  ( -69.95, -72.91)   59.82                70
 05/05/2019   19:12:01   ( -70.64,  68.70) 05/05/2019   19:13:00  ( -70.63,  68.67)    2.06                59
 05/05/2019   20:02:45   (  70.54,-123.82) 05/05/2019   20:02:26  (  70.56,-123.78)    3.00                19