Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2021 3 25.  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)
 03/27/2021   08:04:59   (  70.98,  56.17) 03/27/2021   08:05:54  (  70.98,  56.10)    2.36                55
 03/27/2021   08:55:42   ( -70.93,-136.43) 03/27/2021   08:55:23  ( -70.92,-136.35)    3.16                19
 03/27/2021   09:46:10   (  70.03,  32.32) 03/27/2021   09:45:03  (  70.11,  30.08)   85.14                67
 03/30/2021   00:21:20   (  71.03, 172.01) 03/30/2021   00:22:22  (  71.00, 172.02)    3.47                62
 03/30/2021   01:12:02   ( -70.93, -20.50) 03/30/2021   01:11:51  ( -70.95, -20.44)    2.90                11
 03/30/2021   02:02:36   (  70.35, 147.76) 03/30/2021   02:01:26  (  70.40, 146.39)   51.26                70
 04/01/2021   16:37:40   (  71.04, -72.07) 04/01/2021   16:38:50  (  71.02, -72.08)    2.22                70
 04/01/2021   17:28:22   ( -70.94,  95.43) 04/01/2021   17:28:20  ( -70.91,  95.39)    2.79                 2
 04/01/2021   18:19:01   (  70.62, -96.74) 04/01/2021   18:17:49  (  70.70, -97.30)   22.00                72
 04/04/2021   08:54:03   (  71.26,  43.49) 04/04/2021   08:55:15  (  71.14,  43.99)   21.99                72
 04/04/2021   09:44:41   ( -70.94,-148.65) 04/04/2021   09:44:47  ( -70.93,-148.71)    2.56                 6
 04/04/2021   10:35:24   (  70.84,  18.83) 04/04/2021   10:34:13  (  70.87,  18.85)    3.47                71
 04/07/2021   01:10:28   (  71.53, 158.95) 04/07/2021   01:11:38  (  71.42, 160.32)   49.91                70
 04/07/2021   02:01:01   ( -70.95, -32.73) 04/07/2021   02:01:15  ( -70.94, -32.82)    3.30                14
 04/07/2021   02:51:44   (  70.85, 134.75) 04/07/2021   02:50:41  (  70.88, 134.74)    2.98                63