Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 2 22.  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)
 02/23/2021   03:58:12   ( -70.88, -62.17) 02/23/2021   03:58:58  ( -70.90, -62.20)    2.51                46
 02/23/2021   04:48:56   (  70.79, 105.30) 02/23/2021   04:48:25  (  70.81, 105.30)    2.03                31
 02/25/2021   20:14:33   ( -70.91,  53.72) 02/25/2021   20:15:26  ( -70.90,  53.69)    1.37                53
 02/25/2021   21:05:17   (  70.82,-138.83) 02/25/2021   21:04:53  (  70.81,-138.82)    1.77                24
 02/25/2021   21:55:43   ( -69.91,  29.94) 02/25/2021   21:54:36  ( -69.98,  27.60)   89.40                67
 02/28/2021   12:30:54   ( -70.93, 169.61) 02/28/2021   12:31:53  ( -70.95, 169.65)    2.82                59
 02/28/2021   13:21:38   (  70.85, -22.95) 02/28/2021   13:21:20  (  70.85, -22.87)    3.06                18
 02/28/2021   14:12:09   ( -70.20, 145.42) 02/28/2021   14:10:59  ( -70.25, 143.87)   58.78                70
 03/03/2021   04:47:14   ( -70.96, -74.51) 03/03/2021   04:48:20  ( -70.95, -74.49)    1.74                66
 03/03/2021   05:37:57   (  70.84,  93.01) 03/03/2021   05:37:47  (  70.84,  93.00)    0.63                10
 03/03/2021   06:28:33   ( -70.44, -99.02) 03/03/2021   06:27:21  ( -70.51, -99.86)   32.33                72
 03/05/2021   21:03:35   ( -70.99,  41.37) 03/05/2021   21:04:47  ( -70.99,  41.46)    3.29                72
 03/05/2021   21:54:18   (  70.88,-151.12) 03/05/2021   21:54:14  (  70.88,-151.06)    2.32                 4
 03/05/2021   22:44:58   ( -70.68,  16.52) 03/05/2021   22:43:45  ( -70.72,  16.33)    8.42                73