Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 8 31.  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)
 09/01/2020   21:10:31   ( -70.65,  39.38) 09/01/2020   21:11:17  ( -70.63,  39.43)    2.30                46
 09/01/2020   22:01:15   (  70.54,-153.14) 09/01/2020   22:00:44  (  70.53,-153.08)    2.76                31
 09/04/2020   13:26:54   ( -70.66, 155.28) 09/04/2020   13:27:47  ( -70.65, 155.34)    2.34                53
 09/04/2020   14:17:38   (  70.55, -37.25) 09/04/2020   14:17:14  (  70.54, -37.18)    2.74                24
 09/04/2020   15:08:04   ( -69.66, 131.46) 09/04/2020   15:06:57  ( -69.73, 129.28)   84.17                67
 09/07/2020   05:43:17   ( -70.67, -88.83) 09/07/2020   05:44:17  ( -70.67, -88.76)    2.67                60
 09/07/2020   06:34:01   (  70.57,  78.64) 09/07/2020   06:33:44  (  70.56,  78.72)    2.97                17
 09/07/2020   07:24:32   ( -69.93,-113.04) 09/07/2020   07:23:22  ( -70.02,-114.43)   53.65                70
 09/09/2020   21:59:39   ( -70.69,  27.06) 09/09/2020   22:00:46  ( -70.68,  27.14)    3.05                67
 09/09/2020   22:50:23   (  70.58,-165.47) 09/09/2020   22:50:13  (  70.57,-165.39)    3.42                10
 09/09/2020   23:40:59   ( -70.21,   2.44) 09/09/2020   23:39:47  ( -70.25,   1.78)   25.29                72
 09/12/2020   14:16:04   ( -70.81, 142.77) 09/12/2020   14:17:15  ( -70.75, 143.12)   14.34                71
 09/12/2020   15:06:45   (  70.55, -49.50) 09/12/2020   15:06:43  (  70.58, -49.50)    3.11                 2
 09/12/2020   15:57:26   ( -70.44, 118.00) 09/12/2020   15:56:14  ( -70.43, 117.91)    3.56                72