Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 4 16.  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)
 04/16/2021   21:57:23   (  69.63,-149.78) 04/16/2021   21:58:13  (  69.60,-149.76)    3.14                50
 04/16/2021   22:48:04   ( -69.49,  17.74) 04/16/2021   22:47:43  ( -69.48,  17.72)    1.32                21
 04/16/2021   23:38:31   (  68.51,-173.59) 04/16/2021   23:37:24  (  68.60,-175.77)   89.10                67
 04/19/2021   14:13:43   (  69.64, -33.86) 04/19/2021   14:14:40  (  69.62, -33.86)    2.42                57
 04/19/2021   15:04:24   ( -69.50, 133.66) 04/19/2021   15:04:10  ( -69.50, 133.62)    1.35                14
 04/19/2021   15:54:56   (  68.79, -58.03) 04/19/2021   15:53:47  (  68.84, -59.59)   63.18                69
 04/22/2021   06:30:03   (  69.65,  82.06) 04/22/2021   06:31:07  (  69.63,  82.03)    2.68                64
 04/22/2021   07:20:44   ( -69.52,-110.43) 04/22/2021   07:20:37  ( -69.52,-110.48)    2.22                 7
 04/22/2021   08:11:21   (  69.07,  57.53) 04/22/2021   08:10:10  (  69.07,  56.58)   37.52                71
 04/24/2021   22:46:22   (  69.66,-162.02) 04/24/2021   22:47:32  (  69.69,-162.01)    3.06                70
 04/24/2021   23:37:04   ( -69.58,   5.41) 04/24/2021   23:37:02  ( -69.58,   5.48)    2.59                 2
 04/25/2021   00:27:44   (  69.29, 173.15) 04/25/2021   00:26:31  (  69.36, 172.83)   14.47                73
 04/27/2021   15:02:46   (  69.88, -46.42) 04/27/2021   15:03:57  (  69.80, -45.98)   19.52                71
 04/27/2021   15:53:24   ( -69.59, 121.33) 04/27/2021   15:53:29  ( -69.58, 121.36)    1.73                 5
 04/27/2021   16:44:07   (  69.46, -71.17) 04/27/2021   16:42:56  (  69.47, -71.15)    1.02                71