Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 8 26.  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)
 08/27/2021   06:20:48   (  71.23,  82.86) 08/27/2021   06:21:09  (  71.23,  82.87)    0.27                21
 08/27/2021   07:11:30   ( -71.15,-109.68) 08/27/2021   07:10:38  ( -71.17,-109.60)    3.69                52
 08/29/2021   22:37:07   (  71.27,-161.26) 08/29/2021   22:37:38  (  71.26,-161.21)    2.29                31
 08/29/2021   23:27:48   ( -71.14,   6.28) 08/29/2021   23:27:08  ( -71.15,   6.25)    1.36                40
 09/01/2021   14:53:25   (  71.26, -45.30) 09/01/2021   14:54:07  (  71.28, -45.29)    2.46                42
 09/01/2021   15:44:07   ( -71.19, 122.15) 09/01/2021   15:43:37  ( -71.18, 122.17)    1.41                30
 09/04/2021   07:09:44   (  71.31,  70.57) 09/04/2021   07:10:36  (  71.30,  70.62)    1.92                52
 09/04/2021   08:00:25   ( -71.18,-121.89) 09/04/2021   08:00:06  ( -71.20,-121.92)    2.18                19
 09/04/2021   08:50:53   (  70.26,  46.93) 09/04/2021   08:49:47  (  70.33,  44.40)   95.27                66
 09/06/2021   23:26:01   (  71.30,-173.47) 09/06/2021   23:27:04  (  71.32,-173.47)    2.13                63
 09/07/2021   00:16:43   ( -71.22,  -6.02) 09/07/2021   00:16:34  ( -71.21,  -6.01)    1.34                 9
 09/07/2021   01:07:18   (  70.68, 162.21) 09/07/2021   01:06:08  (  70.72, 160.87)   49.65                70
 09/09/2021   15:42:21   (  71.39, -57.70) 09/09/2021   15:43:32  (  71.38, -57.49)    7.63                71
 09/09/2021   16:33:01   ( -71.22, 109.93) 09/09/2021   16:33:03  ( -71.22, 109.89)    1.57                 2
 09/09/2021   17:23:43   (  71.03, -82.44) 09/09/2021   17:22:31  (  71.06, -82.73)   10.62                72