Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 9 11.  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)
 09/12/2020   14:16:03   ( -70.76, 142.86) 09/12/2020   14:17:15  ( -70.71, 143.06)    9.11                72
 09/12/2020   15:06:45   (  70.54, -49.48) 09/12/2020   15:06:43  (  70.55, -49.53)    2.25                 2
 09/12/2020   15:57:26   ( -70.44, 118.00) 09/12/2020   15:56:13  ( -70.44, 117.94)    2.21                73
 09/15/2020   06:32:31   ( -71.03,-101.69) 09/15/2020   06:33:42  ( -70.88,-100.81)   36.41                71
 09/15/2020   07:23:08   (  70.56,  66.41) 09/15/2020   07:23:13  (  70.55,  66.34)    2.47                 5
 09/15/2020   08:13:49   ( -70.46,-126.11) 09/15/2020   08:12:43  ( -70.45,-126.18)    2.78                66
 09/17/2020   22:48:58   ( -71.26,  13.84) 09/17/2020   22:50:07  ( -71.14,  15.49)   60.49                69
 09/17/2020   23:39:31   (  70.57,-177.71) 09/17/2020   23:39:42  (  70.60,-177.70)    2.90                11
 09/18/2020   00:30:12   ( -70.47, -10.22) 09/18/2020   00:29:12  ( -70.50, -10.22)    2.98                60
 09/20/2020   15:05:26   ( -71.53, 129.27) 09/20/2020   15:06:32  ( -71.41, 131.80)   90.51                66
 09/20/2020   15:55:54   (  70.59, -61.82) 09/20/2020   15:56:12  (  70.59, -61.83)    0.42                18
 09/20/2020   16:46:34   ( -70.49, 105.67) 09/20/2020   16:45:41  ( -70.49, 105.65)    0.77                53
 09/23/2020   08:12:16   (  70.61,  54.06) 09/23/2020   08:12:40  (  70.64,  54.11)    3.15                24
 09/23/2020   09:02:57   ( -70.51,-138.45) 09/23/2020   09:02:11  ( -70.48,-138.48)    2.90                46