Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 3 30.  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)
 04/01/2021   16:37:40   (  71.04, -72.06) 04/01/2021   16:38:50  (  71.02, -72.08)    1.52                70
 04/01/2021   17:28:22   ( -70.94,  95.42) 04/01/2021   17:28:19  ( -70.96,  95.47)    3.35                 3
 04/01/2021   18:19:01   (  70.62, -96.74) 04/01/2021   18:17:49  (  70.70, -97.30)   22.51                72
 04/04/2021   08:54:03   (  71.25,  43.50) 04/04/2021   08:55:15  (  71.14,  43.99)   21.26                72
 04/04/2021   09:44:41   ( -70.94,-148.65) 04/04/2021   09:44:47  ( -70.92,-148.72)    3.15                 6
 04/04/2021   10:35:24   (  70.84,  18.84) 04/04/2021   10:34:14  (  70.82,  18.76)    3.37                70
 04/07/2021   01:10:28   (  71.52, 158.96) 04/07/2021   01:11:38  (  71.42, 160.31)   49.25                70
 04/07/2021   02:01:02   ( -71.00, -32.82) 04/07/2021   02:01:14  ( -70.99, -32.74)    3.32                12
 04/07/2021   02:51:45   (  70.90, 134.67) 04/07/2021   02:50:41  (  70.88, 134.73)    3.18                64
 04/09/2021   17:26:54   (  71.84, -85.70) 04/09/2021   17:28:00  (  71.75, -83.27)   85.26                66
 04/09/2021   18:17:22   ( -71.02,  83.09) 04/09/2021   18:17:42  ( -70.99,  83.14)    3.22                20
 04/09/2021   19:08:04   (  70.86,-109.33) 04/09/2021   19:07:09  (  70.88,-109.39)    3.05                55
 04/12/2021   10:33:41   ( -70.98,-160.91) 04/12/2021   10:34:10  ( -70.99,-160.99)    2.94                29
 04/12/2021   11:24:25   (  70.93,   6.49) 04/12/2021   11:23:36  (  70.93,   6.57)    2.75                49