Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 4 19.  Predictions up to the next  14.0 days:

     Date     Time(FY3D) FY3D Lat/Lon Date Time(TERRA) TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 04/19/2021   14:13:43   (  69.62, -33.84) 04/19/2021   14:14:40  (  69.64, -33.83)    1.80                57
 04/19/2021   15:04:25   ( -69.54, 133.60) 04/19/2021   15:04:10  ( -69.52, 133.64)    3.14                15
 04/19/2021   15:54:56   (  68.77, -58.01) 04/19/2021   15:53:47  (  68.86, -59.56)   63.45                69
 04/22/2021   06:30:02   (  69.64,  82.08) 04/22/2021   06:31:06  (  69.65,  82.06)    1.19                64
 04/22/2021   07:20:44   ( -69.56,-110.49) 04/22/2021   07:20:36  ( -69.53,-110.46)    3.19                 8
 04/22/2021   08:11:20   (  69.06,  57.54) 04/22/2021   08:10:09  (  69.09,  56.61)   37.30                71
 04/24/2021   22:46:22   (  69.66,-162.02) 04/24/2021   22:47:33  (  69.65,-162.06)    1.75                71
 04/24/2021   23:37:03   ( -69.53,   5.50) 04/24/2021   23:37:03  ( -69.54,   5.43)    3.07                 0
 04/25/2021   00:27:44   (  69.29, 173.15) 04/25/2021   00:26:32  (  69.32, 172.78)   15.04                72
 04/27/2021   15:02:46   (  69.89, -46.43) 04/27/2021   15:03:57  (  69.82, -45.95)   19.88                71
 04/27/2021   15:53:24   ( -69.60, 121.32) 04/27/2021   15:53:29  ( -69.60, 121.38)    2.34                 5
 04/27/2021   16:44:07   (  69.47, -71.17) 04/27/2021   16:42:56  (  69.49, -71.12)    2.68                71
 04/30/2021   07:19:10   (  70.12,  69.15) 04/30/2021   07:20:20  (  70.03,  70.22)   41.91                70
 04/30/2021   08:09:43   ( -69.57,-122.70) 04/30/2021   08:09:56  ( -69.59,-122.74)    2.93                13
 04/30/2021   09:00:27   (  69.49,  44.73) 04/30/2021   08:59:23  (  69.48,  44.75)    1.59                64
 05/02/2021   23:35:33   (  70.36,-175.28) 05/02/2021   23:36:41  (  70.29,-173.52)   66.21                68
 05/03/2021   00:26:03   ( -69.65,  -6.88) 05/03/2021   00:26:21  ( -69.64,  -6.80)    3.23                18
 05/03/2021   01:16:46   (  69.52, 160.63) 05/03/2021   01:15:48  (  69.52, 160.68)    2.01                58