Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 12 3.  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)
 12/04/2020   17:15:37   (  70.77, -81.76) 12/04/2020   17:16:34  (  70.76, -81.70)    2.77                57
 12/04/2020   18:06:18   ( -70.63,  85.80) 12/04/2020   18:06:04  ( -70.64,  85.76)    2.33                14
 12/04/2020   18:56:50   (  69.93,-105.79) 12/04/2020   18:55:41  (  69.99,-107.54)   67.05                69
 12/07/2020   09:31:58   (  70.75,  34.21) 12/07/2020   09:33:03  (  70.76,  34.18)    1.82                65
 12/07/2020   10:22:40   ( -70.65,-158.32) 12/07/2020   10:22:33  ( -70.65,-158.35)    1.12                 7
 12/07/2020   11:13:16   (  70.17,   9.77) 12/07/2020   11:12:06  (  70.22,   8.66)   42.11                70
 12/10/2020   01:48:20   (  70.78, 150.09) 12/10/2020   01:49:32  (  70.76, 150.06)    1.98                72
 12/10/2020   02:39:02   ( -70.68, -42.44) 12/10/2020   02:39:02  ( -70.66, -42.46)    3.12                 0
 12/10/2020   03:29:43   (  70.46, 125.23) 12/10/2020   03:28:30  (  70.49, 124.94)   11.37                73
 12/12/2020   18:04:45   (  71.02, -94.39) 12/12/2020   18:05:57  (  70.92, -93.82)   23.67                72
 12/12/2020   18:55:23   ( -70.71,  73.43) 12/12/2020   18:55:29  ( -70.70,  73.49)    2.33                 6
 12/12/2020   19:46:06   (  70.60,-119.07) 12/12/2020   19:44:56  (  70.59,-119.03)    1.42                70
 12/15/2020   10:21:12   (  71.31,  21.02) 12/15/2020   10:22:21  (  71.17,  22.47)   53.81                69
 12/15/2020   11:11:44   ( -70.70,-170.61) 12/15/2020   11:11:58  ( -70.69,-170.65)    1.39                14
 12/15/2020   12:02:27   (  70.58,  -3.11) 12/15/2020   12:01:25  (  70.58,  -3.18)    2.36                62