Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 9 8.  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)
 09/09/2020   21:59:39   ( -70.65,  27.12) 09/09/2020   22:00:47  ( -70.64,  27.08)    2.00                68
 09/09/2020   22:50:23   (  70.54,-165.39) 09/09/2020   22:50:14  (  70.53,-165.44)    1.83                 9
 09/09/2020   23:40:59   ( -70.17,   2.51) 09/09/2020   23:39:47  ( -70.26,   1.80)   28.45                72
 09/12/2020   14:16:04   ( -70.76, 142.85) 09/12/2020   14:17:16  ( -70.70, 143.04)    9.84                72
 09/12/2020   15:06:46   (  70.55, -49.49) 09/12/2020   15:06:44  (  70.54, -49.56)    2.67                 2
 09/12/2020   15:57:27   ( -70.44, 117.99) 09/12/2020   15:56:14  ( -70.43, 117.92)    2.91                73
 09/15/2020   06:32:30   ( -70.98,-101.60) 09/15/2020   06:33:42  ( -70.86,-100.82)   30.77                72
 09/15/2020   07:23:08   (  70.56,  66.41) 09/15/2020   07:23:12  (  70.59,  66.40)    3.68                 4
 09/15/2020   08:13:50   ( -70.50,-126.19) 09/15/2020   08:12:42  ( -70.49,-126.11)    3.37                68
 09/17/2020   22:48:58   ( -71.24,  13.86) 09/17/2020   22:50:07  ( -71.13,  15.48)   59.35                69
 09/17/2020   23:39:31   (  70.57,-177.69) 09/17/2020   23:39:42  (  70.58,-177.72)    2.32                11
 09/18/2020   00:30:12   ( -70.46, -10.21) 09/18/2020   00:29:12  ( -70.49, -10.24)    3.05                60
 09/20/2020   15:05:26   ( -71.51, 129.30) 09/20/2020   15:06:32  ( -71.40, 131.78)   88.67                66
 09/20/2020   15:55:54   (  70.58, -61.80) 09/20/2020   15:56:12  (  70.58, -61.86)    2.16                18
 09/20/2020   16:46:35   ( -70.47, 105.70) 09/20/2020   16:45:42  ( -70.48, 105.63)    2.64                53