Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 9 9.  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   ( -70.68,  27.07) 09/09/2020   22:00:46  ( -70.66,  27.11)    2.87                67
 09/09/2020   22:50:23   (  70.57,-165.45) 09/09/2020   22:50:13  (  70.56,-165.40)    2.28                10
 09/09/2020   23:40:59   ( -70.21,   2.45) 09/09/2020   23:39:47  ( -70.23,   1.75)   26.50                72
 09/12/2020   14:16:03   ( -70.75, 142.87) 09/12/2020   14:17:15  ( -70.72, 143.08)    7.99                72
 09/12/2020   15:06:46   (  70.58, -49.55) 09/12/2020   15:06:43  (  70.56, -49.52)    3.07                 3
 09/12/2020   15:57:26   ( -70.43, 118.02) 09/12/2020   15:56:13  ( -70.45, 117.96)    3.43                73
 09/15/2020   06:32:31   ( -71.02,-101.67) 09/15/2020   06:33:42  ( -70.89,-100.79)   35.18                71
 09/15/2020   07:23:08   (  70.55,  66.42) 09/15/2020   07:23:13  (  70.56,  66.36)    2.78                 5
 09/15/2020   08:13:49   ( -70.44,-126.09) 09/15/2020   08:12:43  ( -70.46,-126.16)    2.99                66
 09/17/2020   22:48:58   ( -71.24,  13.87) 09/17/2020   22:50:07  ( -71.16,  15.51)   59.79                69
 09/17/2020   23:39:31   (  70.56,-177.69) 09/17/2020   23:39:43  (  70.55,-177.77)    3.15                12
 09/18/2020   00:30:13   ( -70.51, -10.28) 09/18/2020   00:29:12  ( -70.51, -10.20)    2.91                61
 09/20/2020   15:05:25   ( -71.51, 129.30) 09/20/2020   15:06:31  ( -71.42, 131.82)   89.78                66
 09/20/2020   15:55:53   (  70.58, -61.80) 09/20/2020   15:56:11  (  70.60, -61.82)    2.62                18
 09/20/2020   16:46:35   ( -70.52, 105.61) 09/20/2020   16:45:41  ( -70.50, 105.67)    3.22                54