Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 1 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)
 01/30/2021   00:40:26   (  70.85, 167.20) 01/30/2021   00:41:18  (  70.88, 167.23)    3.42                52
 01/30/2021   01:31:07   ( -70.76, -25.32) 01/30/2021   01:30:48  ( -70.76, -25.32)    0.28                19
 01/30/2021   02:21:36   (  69.85, 143.41) 01/30/2021   02:20:29  (  69.89, 141.07)   90.01                67
 02/01/2021   16:56:46   (  70.86, -76.89) 02/01/2021   16:57:46  (  70.86, -76.92)    0.85                60
 02/01/2021   17:47:27   ( -70.77,  90.59) 02/01/2021   17:47:16  ( -70.75,  90.54)    2.83                11
 02/01/2021   18:38:01   (  70.13,-101.08) 02/01/2021   18:36:52  (  70.15,-102.69)   60.81                69
 02/04/2021   09:13:07   (  70.88,  39.01) 02/04/2021   09:14:14  (  70.90,  39.02)    2.09                67
 02/04/2021   10:03:48   ( -70.78,-153.50) 02/04/2021   10:03:44  ( -70.78,-153.52)    1.06                 4
 02/04/2021   10:54:27   (  70.40,  14.41) 02/04/2021   10:53:15  (  70.46,  13.64)   29.41                72
 02/07/2021   01:29:30   (  71.00, 154.74) 02/07/2021   01:30:41  (  70.98, 155.02)   10.69                71
 02/07/2021   02:20:09   ( -70.79, -37.59) 02/07/2021   02:20:12  ( -70.81, -37.60)    2.84                 3
 02/07/2021   03:10:52   (  70.63, 129.97) 02/07/2021   03:09:40  (  70.65, 129.81)    6.64                72
 02/09/2021   17:45:56   (  71.28, -89.82) 02/09/2021   17:47:06  (  71.17, -88.80)   38.38                70
 02/09/2021   18:36:30   ( -70.80,  78.32) 02/09/2021   18:36:41  ( -70.79,  78.24)    3.28                11
 02/09/2021   19:27:13   (  70.70,-114.21) 02/09/2021   19:26:06  (  70.73,-114.20)    3.36                67