Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 10 28.  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)
 10/30/2021   15:24:03   ( -71.46, 127.16) 10/30/2021   15:25:13  ( -71.43, 127.18)    2.99                70
 10/30/2021   16:14:46   (  71.32, -65.29) 10/30/2021   16:14:40  (  71.34, -65.33)    2.44                 6
 10/30/2021   17:05:24   ( -71.05, 102.51) 10/30/2021   17:04:12  ( -71.11, 101.94)   21.62                72
 11/02/2021   07:40:26   ( -71.76,-117.43) 11/02/2021   07:41:37  ( -71.69,-116.51)   32.89                71
 11/02/2021   08:31:04   (  71.37,  50.58) 11/02/2021   08:31:08  (  71.38,  50.61)    1.34                 4
 11/02/2021   09:21:44   ( -71.25,-141.88) 11/02/2021   09:20:37  ( -71.26,-141.94)    2.71                67
 11/04/2021   23:56:50   ( -72.16,  -2.24) 11/04/2021   23:57:57  ( -72.10,   0.08)   79.43                67
 11/05/2021   00:47:20   (  71.37, 166.54) 11/05/2021   00:47:36  (  71.36, 166.46)    3.29                16
 11/05/2021   01:38:02   ( -71.29, -26.01) 11/05/2021   01:37:05  ( -71.30, -26.00)    0.78                57
 11/07/2021   17:03:38   (  71.42, -77.60) 11/07/2021   17:04:03  (  71.43, -77.53)    2.76                25
 11/07/2021   17:54:20   ( -71.34,  89.87) 11/07/2021   17:53:33  ( -71.32,  89.92)    2.36                47
 11/10/2021   09:19:55   (  71.42,  38.35) 11/10/2021   09:20:31  (  71.45,  38.38)    3.07                36
 11/10/2021   10:10:37   ( -71.33,-154.17) 11/10/2021   10:10:01  ( -71.34,-154.16)    1.49                36