Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 9 4.  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   13:26:53   ( -70.62, 155.33) 09/04/2020   13:27:47  ( -70.63, 155.30)    1.17                54
 09/04/2020   14:17:37   (  70.52, -37.19) 09/04/2020   14:17:14  (  70.52, -37.21)    1.19                23
 09/04/2020   15:08:04   ( -69.68, 131.43) 09/04/2020   15:06:57  ( -69.70, 129.25)   84.11                67
 09/07/2020   05:43:16   ( -70.64, -88.77) 09/07/2020   05:44:17  ( -70.64, -88.80)    1.13                61
 09/07/2020   06:34:00   (  70.53,  78.71) 09/07/2020   06:33:44  (  70.53,  78.69)    1.18                16
 09/07/2020   07:24:32   ( -69.95,-113.07) 09/07/2020   07:23:22  ( -69.99,-114.47)   53.48                70
 09/09/2020   21:59:39   ( -70.65,  27.12) 09/09/2020   22:00:47  ( -70.65,  27.10)    1.00                68
 09/09/2020   22:50:23   (  70.54,-165.40) 09/09/2020   22:50:14  (  70.54,-165.42)    1.00                 9
 09/09/2020   23:41:00   ( -70.23,   2.42) 09/09/2020   23:39:47  ( -70.28,   1.82)   23.30                73
 09/12/2020   14:16:04   ( -70.77, 142.84) 09/12/2020   14:17:16  ( -70.72, 143.07)   10.16                72
 09/12/2020   15:06:46   (  70.56, -49.51) 09/12/2020   15:06:44  (  70.55, -49.53)    1.22                 2
 09/12/2020   15:57:27   ( -70.45, 117.98) 09/12/2020   15:56:14  ( -70.45, 117.95)    1.18                73
 09/15/2020   06:32:31   ( -71.04,-101.71) 09/15/2020   06:33:41  ( -70.94,-100.71)   38.00                70
 09/15/2020   07:23:08   (  70.57,  66.38) 09/15/2020   07:23:13  (  70.55,  66.35)    2.31                 5
 09/15/2020   08:13:49   ( -70.47,-126.13) 09/15/2020   08:12:43  ( -70.46,-126.16)    1.68                66
 09/17/2020   22:48:58   ( -71.27,  13.82) 09/17/2020   22:50:07  ( -71.16,  15.52)   61.92                69
 09/17/2020   23:39:31   (  70.59,-177.73) 09/17/2020   23:39:42  (  70.61,-177.69)    2.83                11
 09/18/2020   00:30:12   ( -70.48, -10.24) 09/18/2020   00:29:13  ( -70.46, -10.28)    2.98                59