Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 8 28.  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)
 08/30/2020   04:54:09   ( -70.63, -76.52) 08/30/2020   04:54:48  ( -70.61, -76.48)    3.00                39
 08/30/2020   05:44:52   (  70.48,  91.04) 08/30/2020   05:44:15  (  70.50,  91.00)    2.72                37
 09/01/2020   21:10:31   ( -70.64,  39.38) 09/01/2020   21:11:17  ( -70.63,  39.42)    2.23                46
 09/01/2020   22:01:15   (  70.54,-153.14) 09/01/2020   22:00:44  (  70.52,-153.10)    3.24                31
 09/04/2020   13:26:54   ( -70.65, 155.28) 09/04/2020   13:27:47  ( -70.64, 155.32)    1.94                53
 09/04/2020   14:17:38   (  70.55, -37.25) 09/04/2020   14:17:14  (  70.53, -37.20)    2.97                24
 09/04/2020   15:08:04   ( -69.65, 131.46) 09/04/2020   15:06:57  ( -69.72, 129.27)   84.77                67
 09/07/2020   05:43:17   ( -70.66, -88.82) 09/07/2020   05:44:17  ( -70.65, -88.78)    1.89                60
 09/07/2020   06:34:01   (  70.56,  78.65) 09/07/2020   06:33:44  (  70.54,  78.69)    3.08                17
 09/07/2020   07:24:32   ( -69.93,-113.04) 09/07/2020   07:23:22  ( -70.01,-114.45)   54.61                70
 09/09/2020   21:59:40   ( -70.68,  27.07) 09/09/2020   22:00:47  ( -70.66,  27.11)    2.11                67
 09/09/2020   22:50:23   (  70.52,-165.37) 09/09/2020   22:50:14  (  70.54,-165.42)    3.08                 9
 09/09/2020   23:41:00   ( -70.20,   2.46) 09/09/2020   23:39:48  ( -70.23,   1.75)   26.77                72