Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 1 30.  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   (  70.86, -76.90) 02/01/2021   16:57:46  (  70.86, -76.92)    0.69                60
 02/01/2021   17:47:27   ( -70.77,  90.58) 02/01/2021   17:47:16  ( -70.74,  90.54)    3.19                11
 02/01/2021   18:38:01   (  70.13,-101.09) 02/01/2021   18:36:52  (  70.15,-102.69)   60.57                69
 02/04/2021   09:13:07   (  70.88,  39.00) 02/04/2021   09:14:14  (  70.90,  39.02)    1.69                67
 02/04/2021   10:03:48   ( -70.78,-153.51) 02/04/2021   10:03:44  ( -70.78,-153.52)    0.45                 4
 02/04/2021   10:54:27   (  70.41,  14.40) 02/04/2021   10:53:15  (  70.46,  13.64)   28.90                72
 02/07/2021   01:29:30   (  71.01, 154.72) 02/07/2021   01:30:41  (  70.98, 155.03)   11.49                71
 02/07/2021   02:20:09   ( -70.80, -37.61) 02/07/2021   02:20:12  ( -70.82, -37.60)    1.96                 3
 02/07/2021   03:10:52   (  70.64, 129.96) 02/07/2021   03:09:40  (  70.66, 129.81)    5.79                72
 02/09/2021   17:45:56   (  71.29, -89.84) 02/09/2021   17:47:06  (  71.17, -88.80)   39.59                70
 02/09/2021   18:36:30   ( -70.81,  78.29) 02/09/2021   18:36:40  ( -70.84,  78.33)    3.35                10
 02/09/2021   19:27:13   (  70.72,-114.23) 02/09/2021   19:26:06  (  70.74,-114.19)    2.83                67
 02/12/2021   10:02:20   (  71.52,  25.68) 02/12/2021   10:03:28  (  71.46,  27.56)   66.54                68
 02/12/2021   10:52:50   ( -70.83,-165.81) 02/12/2021   10:53:08  ( -70.81,-165.84)    2.76                18
 02/12/2021   11:43:34   (  70.74,   1.66) 02/12/2021   11:42:34  (  70.76,   1.72)    3.04                60