Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 1 28.  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   00:40:25   (  70.84, 167.21) 01/30/2021   00:41:18  (  70.83, 167.15)    2.74                53
 01/30/2021   01:31:06   ( -70.75, -25.31) 01/30/2021   01:30:47  ( -70.76, -25.31)    1.58                19
 01/30/2021   02:21:35   (  69.84, 143.42) 01/30/2021   02:20:28  (  69.90, 141.07)   90.18                67
 02/01/2021   16:56:46   (  70.85, -76.88) 02/01/2021   16:57:46  (  70.86, -76.91)    1.54                60
 02/01/2021   17:47:27   ( -70.76,  90.60) 02/01/2021   17:47:16  ( -70.75,  90.55)    2.09                11
 02/01/2021   18:38:01   (  70.12,-101.07) 02/01/2021   18:36:52  (  70.16,-102.68)   61.06                69
 02/04/2021   09:13:07   (  70.87,  39.02) 02/04/2021   09:14:14  (  70.90,  39.02)    3.18                67
 02/04/2021   10:03:48   ( -70.77,-153.49) 02/04/2021   10:03:44  ( -70.79,-153.52)    2.31                 4
 02/04/2021   10:54:27   (  70.40,  14.42) 02/04/2021   10:53:15  (  70.46,  13.64)   29.96                72
 02/07/2021   01:29:30   (  70.99, 154.75) 02/07/2021   01:30:42  (  70.92, 154.94)    9.98                72
 02/07/2021   02:20:10   ( -70.83, -37.66) 02/07/2021   02:20:12  ( -70.82, -37.59)    3.03                 2
 02/07/2021   03:10:53   (  70.68, 129.90) 02/07/2021   03:09:39  (  70.71, 129.89)    3.81                74
 02/09/2021   17:45:55   (  71.27, -89.80) 02/09/2021   17:47:05  (  71.16, -88.80)   37.45                70
 02/09/2021   18:36:30   ( -70.84,  78.25) 02/09/2021   18:36:39  ( -70.84,  78.32)    2.81                 9
 02/09/2021   19:27:13   (  70.69,-114.20) 02/09/2021   19:26:07  (  70.68,-114.28)    3.52                66