Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 2 8.  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)
 02/09/2021   17:45:55   (  71.28, -89.82) 02/09/2021   17:47:05  (  71.18, -88.78)   38.42                70
 02/09/2021   18:36:29   ( -70.81,  78.30) 02/09/2021   18:36:40  ( -70.79,  78.24)    3.33                11
 02/09/2021   19:27:13   (  70.70,-114.21) 02/09/2021   19:26:07  (  70.69,-114.26)    2.03                66
 02/12/2021   10:02:21   (  71.56,  25.61) 02/12/2021   10:03:29  (  71.42,  27.48)   67.73                68
 02/12/2021   10:52:50   ( -70.83,-165.80) 02/12/2021   10:53:08  ( -70.81,-165.85)    2.43                18
 02/12/2021   11:43:34   (  70.73,   1.68) 02/12/2021   11:42:35  (  70.71,   1.65)    1.70                59
 02/15/2021   02:18:46   (  71.79, 141.12) 02/15/2021   02:19:52  (  71.70, 143.84)   95.08                66
 02/15/2021   03:09:11   ( -70.85, -49.90) 02/15/2021   03:09:36  ( -70.83, -49.94)    2.19                25
 02/15/2021   03:59:55   (  70.75, 117.57) 02/15/2021   03:59:03  (  70.73, 117.55)    2.39                52
 02/17/2021   19:25:32   ( -70.87,  65.99) 02/17/2021   19:26:04  ( -70.85,  65.96)    2.70                32
 02/17/2021   20:16:16   (  70.78,-126.54) 02/17/2021   20:15:30  (  70.80,-126.47)    3.48                46
 02/20/2021   11:41:52   ( -70.89,-178.11) 02/20/2021   11:42:30  ( -70.91,-178.06)    2.93                38
 02/20/2021   12:32:36   (  70.81, -10.66) 02/20/2021   12:31:57  (  70.80, -10.58)    3.15                39