Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 4 10.  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)
 04/11/2021   13:24:43   (  69.57, -21.56) 04/11/2021   13:25:20  (  69.54, -21.59)    3.20                37
 04/11/2021   14:15:25   ( -69.48, 145.89) 04/11/2021   14:14:49  ( -69.48, 145.96)    2.88                36
 04/14/2021   05:41:03   (  69.58,  94.36) 04/14/2021   05:41:47  (  69.57,  94.32)    2.05                44
 04/14/2021   06:31:44   ( -69.44, -98.12) 04/14/2021   06:31:17  ( -69.45, -98.20)    3.45                27
 04/16/2021   21:57:22   (  69.60,-149.73) 04/16/2021   21:58:13  (  69.59,-149.77)    1.86                51
 04/16/2021   22:48:04   ( -69.51,  17.72) 04/16/2021   22:47:43  ( -69.48,  17.71)    3.16                21
 04/16/2021   23:38:31   (  68.53,-173.62) 04/16/2021   23:37:24  (  68.59,-175.78)   88.13                67
 04/19/2021   14:13:42   (  69.61, -33.82) 04/19/2021   14:14:40  (  69.60, -33.87)    2.25                58
 04/19/2021   15:04:24   ( -69.53, 133.62) 04/19/2021   15:04:10  ( -69.50, 133.62)    3.12                14
 04/19/2021   15:54:56   (  68.82, -58.07) 04/19/2021   15:53:47  (  68.83, -59.60)   61.80                69
 04/22/2021   06:30:02   (  69.64,  82.08) 04/22/2021   06:31:07  (  69.62,  82.02)    3.22                65
 04/22/2021   07:20:44   ( -69.55,-110.47) 04/22/2021   07:20:36  ( -69.57,-110.41)    3.21                 8
 04/22/2021   08:11:20   (  69.05,  57.55) 04/22/2021   08:10:09  (  69.12,  56.64)   36.65                71