Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 1 27.  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)
 01/27/2021   08:24:05   (  70.83,  51.30) 01/27/2021   08:24:50  (  70.84,  51.29)    1.07                45
 01/27/2021   09:14:46   ( -70.74,-141.23) 01/27/2021   09:14:20  ( -70.72,-141.25)    2.53                26
 01/30/2021   00:40:25   (  70.84, 167.21) 01/30/2021   00:41:18  (  70.83, 167.16)    2.54                53
 01/30/2021   01:31:06   ( -70.75, -25.31) 01/30/2021   01:30:47  ( -70.77, -25.30)    1.99                19
 01/30/2021   02:21:35   (  69.84, 143.42) 01/30/2021   02:20:28  (  69.90, 141.08)   90.03                67
 02/01/2021   16:56:46   (  70.86, -76.88) 02/01/2021   16:57:46  (  70.87, -76.90)    1.39                60
 02/01/2021   17:47:27   ( -70.76,  90.60) 02/01/2021   17:47:16  ( -70.75,  90.56)    1.67                11
 02/01/2021   18:38:01   (  70.12,-101.07) 02/01/2021   18:36:52  (  70.16,-102.68)   60.74                69
 02/04/2021   09:13:07   (  70.87,  39.02) 02/04/2021   09:14:14  (  70.90,  39.03)    3.19                67
 02/04/2021   10:03:48   ( -70.77,-153.49) 02/04/2021   10:03:44  ( -70.79,-153.51)    2.30                 4
 02/04/2021   10:54:27   (  70.40,  14.42) 02/04/2021   10:53:15  (  70.47,  13.65)   29.42                72
 02/07/2021   01:29:30   (  71.00, 154.74) 02/07/2021   01:30:42  (  70.93, 154.95)   10.61                72
 02/07/2021   02:20:09   ( -70.78, -37.59) 02/07/2021   02:20:13  ( -70.77, -37.66)    3.37                 4
 02/07/2021   03:10:53   (  70.68, 129.89) 02/07/2021   03:09:40  (  70.66, 129.82)    3.53                73
 02/09/2021   17:45:55   (  71.28, -89.82) 02/09/2021   17:47:05  (  71.17, -88.79)   38.59                70
 02/09/2021   18:36:29   ( -70.80,  78.32) 02/09/2021   18:36:40  ( -70.80,  78.26)    2.32                11
 02/09/2021   19:27:13   (  70.70,-114.21) 02/09/2021   19:26:07  (  70.69,-114.26)    2.66                66