Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 11 15.  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)
 11/15/2020   22:30:28   ( -71.11,  18.92) 11/15/2020   22:31:39  ( -70.96,  19.83)   36.89                71
 11/15/2020   23:21:04   (  70.63,-172.97) 11/15/2020   23:21:10  (  70.64,-173.01)    2.19                 6
 11/16/2020   00:11:46   ( -70.53,  -5.50) 11/16/2020   00:10:40  ( -70.53,  -5.55)    1.90                66
 11/18/2020   14:46:55   ( -71.37, 134.38) 11/18/2020   14:48:03  ( -71.28, 136.22)   66.23                68
 11/18/2020   15:37:26   (  70.64, -57.06) 11/18/2020   15:37:40  (  70.64, -57.13)    2.70                14
 11/18/2020   16:28:09   ( -70.59, 110.33) 11/18/2020   16:27:09  ( -70.58, 110.41)    2.99                60
 11/21/2020   07:03:22   ( -71.63,-110.17) 11/21/2020   07:04:28  ( -71.55,-107.46)   95.38                66
 11/21/2020   07:53:49   (  70.70,  58.76) 11/21/2020   07:54:09  (  70.69,  58.82)    2.15                20
 11/21/2020   08:44:31   ( -70.59,-133.75) 11/21/2020   08:43:39  ( -70.58,-133.72)    1.82                52
 11/24/2020   00:10:11   (  70.70, 174.67) 11/24/2020   00:10:39  (  70.68, 174.67)    2.93                28
 11/24/2020   01:00:53   ( -70.60, -17.84) 11/24/2020   01:00:09  ( -70.57, -17.85)    2.80                44
 11/26/2020   16:26:32   (  70.71, -69.43) 11/26/2020   16:27:07  (  70.71, -69.39)    1.24                35
 11/26/2020   17:17:14   ( -70.60,  98.07) 11/26/2020   17:16:37  ( -70.61,  98.08)    1.06                37
 11/29/2020   08:42:54   (  70.72,  46.48) 11/29/2020   08:43:36  (  70.75,  46.53)    3.21                42
 11/29/2020   09:33:36   ( -70.61,-146.02) 11/29/2020   09:33:07  ( -70.59,-146.07)    2.85                29