Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 2 5.  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)
 02/07/2021   01:29:30   (  71.01, 154.72) 02/07/2021   01:30:41  (  70.98, 155.02)   11.35                71
 02/07/2021   02:20:09   ( -70.80, -37.62) 02/07/2021   02:20:12  ( -70.81, -37.61)    0.48                 3
 02/07/2021   03:10:52   (  70.64, 129.96) 02/07/2021   03:09:40  (  70.66, 129.81)    5.92                72
 02/09/2021   17:45:56   (  71.29, -89.84) 02/09/2021   17:47:06  (  71.17, -88.80)   39.45                70
 02/09/2021   18:36:30   ( -70.82,  78.28) 02/09/2021   18:36:40  ( -70.84,  78.31)    2.12                10
 02/09/2021   19:27:14   (  70.72,-114.23) 02/09/2021   19:26:07  (  70.74,-114.19)    2.87                67
 02/12/2021   10:02:20   (  71.52,  25.68) 02/12/2021   10:03:28  (  71.46,  27.56)   66.51                68
 02/12/2021   10:52:50   ( -70.84,-165.82) 02/12/2021   10:53:07  ( -70.86,-165.77)    3.14                17
 02/12/2021   11:43:34   (  70.74,   1.66) 02/12/2021   11:42:34  (  70.76,   1.72)    3.23                60
 02/15/2021   02:18:46   (  71.81, 141.09) 02/15/2021   02:19:52  (  71.70, 143.83)   96.08                66
 02/15/2021   03:09:11   ( -70.86, -49.92) 02/15/2021   03:09:36  ( -70.83, -49.94)    3.45                25
 02/15/2021   03:59:54   (  70.72, 117.63) 02/15/2021   03:59:03  (  70.72, 117.55)    3.20                51
 02/17/2021   19:25:32   ( -70.88,  65.97) 02/17/2021   19:26:03  ( -70.90,  66.05)    3.58                31
 02/17/2021   20:16:15   (  70.74,-126.49) 02/17/2021   20:15:31  (  70.74,-126.55)    2.38                44