Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 2 24.  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)
 02/25/2021   20:14:33   ( -70.90,  53.74) 02/25/2021   20:15:26  ( -70.91,  53.69)    2.03                53
 02/25/2021   21:05:17   (  70.81,-138.81) 02/25/2021   21:04:53  (  70.82,-138.81)    0.45                24
 02/25/2021   21:55:43   ( -69.90,  29.95) 02/25/2021   21:54:36  ( -69.98,  27.61)   89.78                67
 02/28/2021   12:30:54   ( -70.92, 169.62) 02/28/2021   12:31:54  ( -70.90, 169.56)    3.09                60
 02/28/2021   13:21:38   (  70.85, -22.93) 02/28/2021   13:21:20  (  70.86, -22.86)    3.29                18
 02/28/2021   14:12:09   ( -70.19, 145.44) 02/28/2021   14:10:59  ( -70.25, 143.87)   59.28                70
 03/03/2021   04:47:14   ( -70.95, -74.49) 03/03/2021   04:48:20  ( -70.95, -74.49)    0.71                66
 03/03/2021   05:37:57   (  70.83,  93.03) 03/03/2021   05:37:47  (  70.85,  93.00)    2.09                10
 03/03/2021   06:28:33   ( -70.43, -99.01) 03/03/2021   06:27:21  ( -70.51, -99.87)   33.12                72
 03/05/2021   21:03:35   ( -70.98,  41.38) 03/05/2021   21:04:47  ( -70.98,  41.45)    2.44                72
 03/05/2021   21:54:18   (  70.87,-151.11) 03/05/2021   21:54:14  (  70.88,-151.07)    2.07                 4
 03/05/2021   22:44:58   ( -70.67,  16.53) 03/05/2021   22:43:45  ( -70.72,  16.32)    9.28                73
 03/08/2021   13:20:00   ( -71.22, 156.90) 03/08/2021   13:21:12  ( -71.12, 157.55)   25.86                72
 03/08/2021   14:10:38   (  70.85, -35.15) 03/08/2021   14:10:42  (  70.85, -35.22)    2.61                 4
 03/08/2021   15:01:20   ( -70.76, 132.32) 03/08/2021   15:00:12  ( -70.75, 132.25)    3.17                68