Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 12 1.  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)
 12/02/2020   00:59:15   (  70.72, 162.40) 12/02/2020   01:00:06  (  70.71, 162.35)    2.19                51
 12/02/2020   01:49:57   ( -70.63, -30.13) 12/02/2020   01:49:35  ( -70.65, -30.10)    2.74                22
 12/04/2020   17:15:37   (  70.75, -81.71) 12/04/2020   17:16:35  (  70.73, -81.75)    2.62                58
 12/04/2020   18:06:19   ( -70.65,  85.76) 12/04/2020   18:06:04  ( -70.67,  85.80)    2.61                15
 12/04/2020   18:56:50   (  69.90,-105.75) 12/04/2020   18:55:42  (  69.96,-107.58)   70.18                68
 12/07/2020   09:31:58   (  70.77,  34.17) 12/07/2020   09:33:02  (  70.79,  34.23)    2.72                64
 12/07/2020   10:22:40   ( -70.68,-158.35) 12/07/2020   10:22:32  ( -70.68,-158.30)    1.99                 8
 12/07/2020   11:13:16   (  70.19,   9.73) 12/07/2020   11:12:05  (  70.25,   8.70)   39.20                71
 12/10/2020   01:48:20   (  70.80, 150.05) 12/10/2020   01:49:31  (  70.79, 150.11)    2.42                71
 12/10/2020   02:39:02   ( -70.70, -42.47) 12/10/2020   02:39:01  ( -70.68, -42.42)    2.89                 1
 12/10/2020   03:29:42   (  70.43, 125.28) 12/10/2020   03:28:30  (  70.46, 124.90)   14.57                72
 12/12/2020   18:04:46   (  71.04, -94.43) 12/12/2020   18:05:57  (  70.95, -93.77)   25.84                71
 12/12/2020   18:55:23   ( -70.68,  73.49) 12/12/2020   18:55:30  ( -70.68,  73.46)    1.16                 7
 12/12/2020   19:46:06   (  70.57,-119.02) 12/12/2020   19:44:57  (  70.57,-119.07)    2.04                69