Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 2 7.  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, -88.79)   38.77                70
 02/09/2021   18:36:29   ( -70.81,  78.29) 02/09/2021   18:36:39  ( -70.84,  78.32)    2.92                10
 02/09/2021   19:27:13   (  70.71,-114.22) 02/09/2021   19:26:07  (  70.69,-114.27)    2.70                66
 02/12/2021   10:02:21   (  71.56,  25.61) 02/12/2021   10:03:29  (  71.41,  27.47)   68.02                68
 02/12/2021   10:52:50   ( -70.83,-165.80) 02/12/2021   10:53:08  ( -70.81,-165.85)    2.79                18
 02/12/2021   11:43:34   (  70.73,   1.67) 02/12/2021   11:42:35  (  70.71,   1.64)    2.37                59
 02/15/2021   02:18:46   (  71.79, 141.11) 02/15/2021   02:19:52  (  71.70, 143.83)   95.30                66
 02/15/2021   03:09:11   ( -70.85, -49.90) 02/15/2021   03:09:36  ( -70.83, -49.94)    2.28                25
 02/15/2021   03:59:55   (  70.75, 117.56) 02/15/2021   03:59:03  (  70.73, 117.55)    2.87                52
 02/17/2021   19:25:32   ( -70.87,  65.99) 02/17/2021   19:26:04  ( -70.85,  65.97)    2.42                32
 02/17/2021   20:16:15   (  70.73,-126.46) 02/17/2021   20:15:31  (  70.74,-126.55)    3.51                44
 02/20/2021   11:41:52   ( -70.89,-178.11) 02/20/2021   11:42:31  ( -70.86,-178.13)    3.29                39
 02/20/2021   12:32:35   (  70.76, -10.58) 02/20/2021   12:31:58  (  70.75, -10.65)    2.74                37