Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 2 6.  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   (  71.00, 154.73) 02/07/2021   01:30:41  (  70.99, 155.03)   11.08                71
 02/07/2021   02:20:09   ( -70.80, -37.61) 02/07/2021   02:20:12  ( -70.81, -37.61)    1.14                 3
 02/07/2021   03:10:52   (  70.64, 129.97) 02/07/2021   03:09:40  (  70.66, 129.81)    6.36                72
 02/09/2021   17:45:55   (  71.28, -89.83) 02/09/2021   17:47:05  (  71.17, -88.79)   38.98                70
 02/09/2021   18:36:29   ( -70.82,  78.29) 02/09/2021   18:36:39  ( -70.84,  78.32)    2.86                10
 02/09/2021   19:27:13   (  70.71,-114.22) 02/09/2021   19:26:07  (  70.69,-114.27)    2.95                66
 02/12/2021   10:02:21   (  71.57,  25.60) 02/12/2021   10:03:29  (  71.41,  27.47)   68.31                68
 02/12/2021   10:52:50   ( -70.83,-165.81) 02/12/2021   10:53:08  ( -70.81,-165.85)    2.78                18
 02/12/2021   11:43:34   (  70.73,   1.67) 02/12/2021   11:42:35  (  70.71,   1.65)    2.64                59
 02/15/2021   02:18:46   (  71.80, 141.10) 02/15/2021   02:19:52  (  71.70, 143.84)   95.68                66
 02/15/2021   03:09:11   ( -70.85, -49.91) 02/15/2021   03:09:36  ( -70.83, -49.93)    2.23                25
 02/15/2021   03:59:55   (  70.76, 117.56) 02/15/2021   03:59:03  (  70.73, 117.55)    3.20                52
 02/17/2021   19:25:32   ( -70.87,  65.98) 02/17/2021   19:26:04  ( -70.85,  65.98)    2.39                32
 02/17/2021   20:16:15   (  70.73,-126.47) 02/17/2021   20:15:31  (  70.75,-126.54)    2.90                44