Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 2 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)
 02/01/2021   16:56:46   (  70.87, -76.90) 02/01/2021   16:57:46  (  70.86, -76.92)    1.49                60
 02/01/2021   17:47:27   ( -70.77,  90.57) 02/01/2021   17:47:15  ( -70.79,  90.61)    2.24                12
 02/01/2021   18:38:01   (  70.13,-101.09) 02/01/2021   18:36:52  (  70.15,-102.70)   60.66                69
 02/04/2021   09:13:07   (  70.88,  39.00) 02/04/2021   09:14:14  (  70.89,  39.01)    0.83                67
 02/04/2021   10:03:48   ( -70.79,-153.52) 02/04/2021   10:03:44  ( -70.77,-153.54)    1.54                 4
 02/04/2021   10:54:27   (  70.41,  14.40) 02/04/2021   10:53:15  (  70.46,  13.63)   29.04                72
 02/07/2021   01:29:30   (  71.00, 154.72) 02/07/2021   01:30:41  (  70.97, 155.02)   11.15                71
 02/07/2021   02:20:09   ( -70.80, -37.61) 02/07/2021   02:20:12  ( -70.81, -37.61)    0.95                 3
 02/07/2021   03:10:52   (  70.64, 129.96) 02/07/2021   03:09:40  (  70.65, 129.80)    6.14                72
 02/09/2021   17:45:56   (  71.28, -89.83) 02/09/2021   17:47:06  (  71.16, -88.81)   38.94                70
 02/09/2021   18:36:30   ( -70.81,  78.30) 02/09/2021   18:36:40  ( -70.83,  78.31)    2.55                10
 02/09/2021   19:27:14   (  70.71,-114.23) 02/09/2021   19:26:07  (  70.73,-114.20)    2.27                67
 02/12/2021   10:02:20   (  71.51,  25.70) 02/12/2021   10:03:28  (  71.45,  27.54)   65.44                68
 02/12/2021   10:52:50   ( -70.82,-165.79) 02/12/2021   10:53:07  ( -70.86,-165.78)    3.48                17
 02/12/2021   11:43:34   (  70.73,   1.67) 02/12/2021   11:42:34  (  70.75,   1.71)    2.44                60
 02/15/2021   02:18:46   (  71.79, 141.12) 02/15/2021   02:19:52  (  71.68, 143.81)   94.47                66
 02/15/2021   03:09:11   ( -70.84, -49.89) 02/15/2021   03:09:36  ( -70.82, -49.95)    3.35                25
 02/15/2021   03:59:55   (  70.75, 117.57) 02/15/2021   03:59:02  (  70.76, 117.61)    2.08                53