Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 9 29.  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)
 10/01/2021   02:43:40   ( -72.19, -44.27) 10/01/2021   02:44:46  ( -72.11, -41.61)   91.22                66
 10/01/2021   03:34:09   (  71.31, 124.67) 10/01/2021   03:34:26  (  71.32, 124.70)    1.76                17
 10/01/2021   04:24:50   ( -71.21, -67.85) 10/01/2021   04:23:56  ( -71.20, -67.86)    1.67                54
 10/03/2021   19:50:26   (  71.33,-119.42) 10/03/2021   19:50:55  (  71.32,-119.42)    0.45                29
 10/03/2021   20:41:07   ( -71.23,  48.07) 10/03/2021   20:40:25  ( -71.21,  48.03)    3.14                42
 10/06/2021   12:06:44   (  71.35,  -3.51) 10/06/2021   12:07:24  (  71.37,  -3.46)    3.38                40
 10/06/2021   12:57:25   ( -71.25, 163.99) 10/06/2021   12:56:54  ( -71.26, 163.99)    1.27                31
 10/09/2021   04:23:02   (  71.37, 112.39) 10/09/2021   04:23:54  (  71.37, 112.41)    0.98                52
 10/09/2021   05:13:43   ( -71.27, -80.10) 10/09/2021   05:13:24  ( -71.25, -80.14)    2.22                19
 10/09/2021   06:04:11   (  70.33,  88.77) 10/09/2021   06:03:05  (  70.39,  86.17)   97.20                66
 10/11/2021   20:39:20   (  71.40,-131.70) 10/11/2021   20:40:23  (  71.40,-131.65)    1.93                63
 10/11/2021   21:30:00   ( -71.29,  35.81) 10/11/2021   21:29:52  ( -71.30,  35.80)    0.37                 8
 10/11/2021   22:20:36   (  70.78,-156.01) 10/11/2021   22:19:26  (  70.81,-157.31)   47.89                70