Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 4 11.  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   (  69.58, -21.59) 04/11/2021   13:25:19  (  69.57, -21.55)    2.08                36
 04/11/2021   14:15:24   ( -69.45, 145.93) 04/11/2021   14:14:49  ( -69.45, 145.93)    1.06                35
 04/14/2021   05:41:03   (  69.60,  94.33) 04/14/2021   05:41:46  (  69.60,  94.36)    1.25                43
 04/14/2021   06:31:44   ( -69.46, -98.15) 04/14/2021   06:31:16  ( -69.49, -98.15)    3.30                28
 04/16/2021   21:57:23   (  69.61,-149.75) 04/16/2021   21:58:13  (  69.62,-149.73)    1.63                50
 04/16/2021   22:48:05   ( -69.52,  17.70) 04/16/2021   22:47:43  ( -69.51,  17.76)    2.61                22
 04/16/2021   23:38:32   (  68.54,-173.63) 04/16/2021   23:37:25  (  68.57,-175.81)   88.41                67
 04/19/2021   14:13:43   (  69.62, -33.83) 04/19/2021   14:14:40  (  69.64, -33.83)    1.81                57
 04/19/2021   15:04:25   ( -69.53, 133.61) 04/19/2021   15:04:10  ( -69.53, 133.66)    1.96                15
 04/19/2021   15:54:56   (  68.77, -58.00) 04/19/2021   15:53:47  (  68.86, -59.56)   63.49                69
 04/22/2021   06:30:02   (  69.64,  82.08) 04/22/2021   06:31:06  (  69.65,  82.06)    1.56                64
 04/22/2021   07:20:44   ( -69.55,-110.48) 04/22/2021   07:20:36  ( -69.55,-110.44)    1.43                 8
 04/22/2021   08:11:20   (  69.05,  57.54) 04/22/2021   08:10:09  (  69.10,  56.61)   37.32                71
 04/24/2021   22:46:22   (  69.65,-162.01) 04/24/2021   22:47:33  (  69.66,-162.05)    1.58                71
 04/24/2021   23:37:04   ( -69.57,   5.43) 04/24/2021   23:37:03  ( -69.55,   5.45)    1.65                 1
 04/25/2021   00:27:44   (  69.28, 173.16) 04/25/2021   00:26:32  (  69.33, 172.79)   15.24                72