Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 9 14.  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)
 09/15/2020   06:32:31   ( -71.01,-101.65) 09/15/2020   06:33:42  ( -70.90,-100.77)   34.06                71
 09/15/2020   07:23:09   (  70.58,  66.37) 09/15/2020   07:23:13  (  70.58,  66.38)    0.93                 4
 09/15/2020   08:13:50   ( -70.49,-126.16) 09/15/2020   08:12:43  ( -70.47,-126.15)    1.84                67
 09/17/2020   22:48:57   ( -71.23,  13.88) 09/17/2020   22:50:06  ( -71.17,  15.53)   59.51                69
 09/17/2020   23:39:31   (  70.60,-177.75) 09/17/2020   23:39:42  (  70.57,-177.74)    2.98                11
 09/18/2020   00:30:12   ( -70.50, -10.27) 09/18/2020   00:29:12  ( -70.47, -10.27)    3.56                60
 09/20/2020   15:05:25   ( -71.51, 129.31) 09/20/2020   15:06:31  ( -71.44, 131.84)   89.83                66
 09/20/2020   15:55:54   (  70.62, -61.87) 09/20/2020   15:56:11  (  70.62, -61.79)    2.75                17
 09/20/2020   16:46:35   ( -70.52, 105.62) 09/20/2020   16:45:41  ( -70.52, 105.69)    2.52                54
 09/23/2020   08:12:16   (  70.59,  54.10) 09/23/2020   08:12:41  (  70.61,  54.08)    3.00                25
 09/23/2020   09:02:58   ( -70.54,-138.49) 09/23/2020   09:02:11  ( -70.51,-138.44)    3.15                47
 09/26/2020   00:28:39   (  70.61, 169.98) 09/26/2020   00:29:11  (  70.60, 169.94)    1.83                32
 09/26/2020   01:19:20   ( -70.50, -22.53) 09/26/2020   01:18:41  ( -70.50, -22.58)    1.87                39