Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 11 1.  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)
 11/02/2021   07:40:26   ( -71.78,-117.47) 11/02/2021   07:41:37  ( -71.68,-116.53)   34.33                71
 11/02/2021   08:31:04   (  71.39,  50.55) 11/02/2021   08:31:08  (  71.37,  50.60)    2.41                 4
 11/02/2021   09:21:45   ( -71.27,-141.92) 11/02/2021   09:20:38  ( -71.25,-141.96)    2.21                67
 11/04/2021   23:56:50   ( -72.18,  -2.29) 11/04/2021   23:57:57  ( -72.09,   0.05)   80.69                67
 11/05/2021   00:47:20   (  71.39, 166.50) 11/05/2021   00:47:35  (  71.40, 166.53)    1.50                15
 11/05/2021   01:38:01   ( -71.27, -25.96) 11/05/2021   01:37:05  ( -71.28, -26.02)    3.21                56
 11/07/2021   17:03:37   (  71.40, -77.56) 11/07/2021   17:04:03  (  71.42, -77.56)    2.18                26
 11/07/2021   17:54:19   ( -71.32,  89.90) 11/07/2021   17:53:33  ( -71.31,  89.90)    1.17                46
 11/10/2021   09:19:54   (  71.41,  38.37) 11/10/2021   09:20:31  (  71.43,  38.35)    2.20                37
 11/10/2021   10:10:36   ( -71.32,-154.15) 11/10/2021   10:10:01  ( -71.32,-154.20)    1.54                35
 11/13/2021   01:36:11   (  71.43, 154.30) 11/13/2021   01:36:59  (  71.43, 154.23)    2.30                48
 11/13/2021   02:26:53   ( -71.33, -38.22) 11/13/2021   02:26:29  ( -71.33, -38.30)    3.18                24