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, 162.41) 12/02/2020   01:00:06  (  70.72, 162.36)    1.83                51
 12/02/2020   01:49:57   ( -70.63, -30.12) 12/02/2020   01:49:35  ( -70.66, -30.10)    3.45                22
 12/02/2020   02:40:24   (  69.67, 138.68) 12/02/2020   02:39:18  (  69.68, 136.14)   98.10                66
 12/04/2020   17:15:37   (  70.74, -81.71) 12/04/2020   17:16:35  (  70.73, -81.74)    1.98                58
 12/04/2020   18:06:19   ( -70.65,  85.77) 12/04/2020   18:06:04  ( -70.67,  85.81)    3.14                15
 12/04/2020   18:56:50   (  69.90,-105.75) 12/04/2020   18:55:42  (  69.97,-107.58)   70.35                68
 12/07/2020   09:31:58   (  70.77,  34.18) 12/07/2020   09:33:02  (  70.79,  34.23)    3.07                64
 12/07/2020   10:22:40   ( -70.67,-158.35) 12/07/2020   10:22:32  ( -70.68,-158.30)    2.02                 8
 12/07/2020   11:13:16   (  70.19,   9.73) 12/07/2020   11:12:05  (  70.25,   8.70)   39.50                71
 12/10/2020   01:48:20   (  70.79, 150.06) 12/10/2020   01:49:31  (  70.79, 150.10)    1.90                71
 12/10/2020   02:39:02   ( -70.70, -42.47) 12/10/2020   02:39:01  ( -70.68, -42.42)    2.40                 1
 12/10/2020   03:29:42   (  70.43, 125.28) 12/10/2020   03:28:30  (  70.46, 124.90)   15.04                72
 12/12/2020   18:04:46   (  71.03, -94.42) 12/12/2020   18:05:57  (  70.94, -93.78)   25.27                71
 12/12/2020   18:55:23   ( -70.67,  73.49) 12/12/2020   18:55:30  ( -70.68,  73.45)    1.75                 7
 12/12/2020   19:46:06   (  70.56,-119.01) 12/12/2020   19:44:57  (  70.56,-119.08)    2.62                69
 12/15/2020   10:21:12   (  71.27,  21.09) 12/15/2020   10:22:21  (  71.19,  22.50)   51.07                69
 12/15/2020   11:11:45   ( -70.71,-170.63) 12/15/2020   11:11:58  ( -70.71,-170.61)    1.21                13
 12/15/2020   12:02:28   (  70.59,  -3.13) 12/15/2020   12:01:25  (  70.60,  -3.14)    0.97                63