Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 8 2.  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)
 08/03/2021   02:12:38   (  71.26, 144.69) 08/03/2021   02:13:49  (  71.27, 144.74)    2.45                71
 08/03/2021   03:03:20   ( -71.16, -47.82) 08/03/2021   03:03:19  ( -71.16, -47.81)    0.44                 1
 08/03/2021   03:54:00   (  70.89, 119.94) 08/03/2021   03:52:48  (  70.95, 119.51)   17.03                72
 08/05/2021   18:29:03   (  71.65,-100.07) 08/05/2021   18:30:13  (  71.55, -98.92)   41.83                70
 08/05/2021   19:19:38   ( -71.19,  68.07) 08/05/2021   19:19:48  ( -71.17,  68.09)    1.90                10
 08/05/2021   20:10:21   (  71.08,-124.44) 08/05/2021   20:09:15  (  71.07,-124.43)    1.48                66
 08/08/2021   10:45:29   (  72.05,  15.13) 08/08/2021   10:46:35  (  71.99,  17.71)   88.67                66
 08/08/2021   11:35:56   ( -71.17,-175.96) 08/08/2021   11:36:18  ( -71.18,-176.01)    2.59                22
 08/08/2021   12:26:39   (  71.07,  -8.47) 08/08/2021   12:25:45  (  71.08,  -8.54)    2.85                54
 08/11/2021   03:52:15   ( -71.21, -60.07) 08/11/2021   03:52:48  ( -71.19, -60.12)    2.23                33
 08/11/2021   04:42:58   (  71.10, 107.41) 08/11/2021   04:42:15  (  71.08, 107.35)    3.31                43
 08/13/2021   20:08:34   ( -71.24,  55.80) 08/13/2021   20:09:17  ( -71.25,  55.85)    1.86                43
 08/13/2021   20:59:17   (  71.14,-136.71) 08/13/2021   20:58:44  (  71.14,-136.68)    1.03                33