Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 9 3.  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)
 09/04/2020   13:26:54   ( -70.65, 155.28) 09/04/2020   13:27:47  ( -70.65, 155.34)    2.02                53
 09/04/2020   14:17:38   (  70.55, -37.23) 09/04/2020   14:17:14  (  70.55, -37.17)    2.18                24
 09/04/2020   15:08:05   ( -69.70, 131.38) 09/04/2020   15:06:57  ( -69.73, 129.29)   80.95                68
 09/07/2020   05:43:17   ( -70.66, -88.82) 09/07/2020   05:44:17  ( -70.67, -88.76)    2.33                60
 09/07/2020   06:34:01   (  70.56,  78.66) 09/07/2020   06:33:44  (  70.56,  78.72)    2.28                17
 09/07/2020   07:24:32   ( -69.93,-113.03) 09/07/2020   07:23:22  ( -70.02,-114.43)   54.27                70
 09/09/2020   21:59:39   ( -70.67,  27.08) 09/09/2020   22:00:46  ( -70.68,  27.14)    2.62                67
 09/09/2020   22:50:23   (  70.57,-165.44) 09/09/2020   22:50:13  (  70.57,-165.38)    2.29                10
 09/09/2020   23:40:59   ( -70.20,   2.46) 09/09/2020   23:39:47  ( -70.25,   1.78)   26.29                72
 09/12/2020   14:16:04   ( -70.79, 142.80) 09/12/2020   14:17:15  ( -70.75, 143.12)   12.40                71
 09/12/2020   15:06:46   (  70.58, -49.54) 09/12/2020   15:06:43  (  70.58, -49.49)    2.16                 3
 09/12/2020   15:57:27   ( -70.47, 117.95) 09/12/2020   15:56:13  ( -70.48, 118.00)    2.36                74
 09/15/2020   06:32:31   ( -71.01,-101.65) 09/15/2020   06:33:42  ( -70.92,-100.73)   34.56                71
 09/15/2020   07:23:09   (  70.59,  66.35) 09/15/2020   07:23:13  (  70.59,  66.40)    1.98                 4
 09/15/2020   08:13:50   ( -70.48,-126.16) 09/15/2020   08:12:43  ( -70.49,-126.11)    2.16                67