Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 3 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)
 03/24/2021   15:48:39   (  70.97, -59.74) 03/24/2021   15:49:26  (  70.96, -59.80)    1.95                47
 03/24/2021   16:39:21   ( -70.87, 107.74) 03/24/2021   16:38:55  ( -70.90, 107.74)    3.54                26
 03/27/2021   08:05:00   (  71.02,  56.10) 03/27/2021   08:05:54  (  70.99,  56.12)    3.27                54
 03/27/2021   08:55:42   ( -70.92,-136.41) 03/27/2021   08:55:23  ( -70.93,-136.33)    3.29                19
 03/27/2021   09:46:10   (  70.02,  32.34) 03/27/2021   09:45:03  (  70.12,  30.10)   85.39                67
 03/30/2021   00:21:20   (  71.02, 172.03) 03/30/2021   00:22:22  (  71.01, 172.04)    1.14                62
 03/30/2021   01:12:02   ( -70.92, -20.48) 03/30/2021   01:11:52  ( -70.90, -20.50)    1.82                10
 03/30/2021   02:02:36   (  70.34, 147.77) 03/30/2021   02:01:26  (  70.42, 146.41)   51.51                70
 04/01/2021   16:37:39   (  71.03, -72.05) 04/01/2021   16:38:49  (  71.03, -72.06)    0.28                70
 04/01/2021   17:28:21   ( -70.93,  95.44) 04/01/2021   17:28:19  ( -70.93,  95.41)    1.24                 2
 04/01/2021   18:19:00   (  70.61, -96.73) 04/01/2021   18:17:48  (  70.71, -97.28)   22.83                72
 04/04/2021   08:54:03   (  71.25,  43.51) 04/04/2021   08:55:15  (  71.15,  44.01)   20.95                72
 04/04/2021   09:44:41   ( -70.93,-148.64) 04/04/2021   09:44:47  ( -70.94,-148.69)    2.16                 6
 04/04/2021   10:35:24   (  70.83,  18.85) 04/04/2021   10:34:14  (  70.83,  18.78)    2.28                70
 04/07/2021   01:10:29   (  71.57, 158.86) 04/07/2021   01:11:38  (  71.43, 160.34)   54.26                69
 04/07/2021   02:01:01   ( -70.95, -32.72) 04/07/2021   02:01:15  ( -70.95, -32.79)    2.82                14
 04/07/2021   02:51:45   (  70.90, 134.67) 04/07/2021   02:50:41  (  70.89, 134.76)    3.23                64