Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 3 14.  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)
 03/15/2021   17:50:39   ( -69.51,  91.87) 03/15/2021   17:51:26  ( -69.50,  91.93)    2.97                47
 03/15/2021   18:41:22   (  69.39,-100.64) 03/15/2021   18:40:53  (  69.39,-100.57)    2.87                29
 03/15/2021   19:31:46   ( -68.34,  68.10) 03/15/2021   19:30:39  ( -68.39,  65.80)   94.56                67
 03/18/2021   10:06:59   ( -69.50,-152.19) 03/18/2021   10:07:53  ( -69.50,-152.19)    0.09                54
 03/18/2021   10:57:42   (  69.38,  15.30) 03/18/2021   10:57:20  (  69.39,  15.31)    1.08                22
 03/18/2021   11:48:11   ( -68.60,-176.30) 03/18/2021   11:47:02  ( -68.62,-178.04)   70.66                69
 03/21/2021   02:23:19   ( -69.49, -36.24) 03/21/2021   02:24:20  ( -69.50, -36.31)    2.66                61
 03/21/2021   03:14:02   (  69.38, 131.24) 03/21/2021   03:13:47  (  69.39, 131.19)    2.04                15
 03/21/2021   04:04:35   ( -68.81, -60.64) 03/21/2021   04:03:25  ( -68.84, -61.89)   50.07                70
 03/23/2021   18:39:40   ( -69.54,  79.62) 03/23/2021   18:40:46  ( -69.55,  79.64)    1.02                66
 03/23/2021   19:30:23   (  69.43,-112.91) 03/23/2021   19:30:13  (  69.43,-112.87)    1.40                10
 03/23/2021   20:20:59   ( -69.01,  55.00) 03/23/2021   20:19:47  ( -69.11,  54.34)   28.55                72
 03/26/2021   10:56:00   ( -69.59,-164.52) 03/26/2021   10:57:11  ( -69.59,-164.42)    3.71                71
 03/26/2021   11:46:42   (  69.43,   3.02) 03/26/2021   11:46:39  (  69.42,   2.99)    2.17                 3
 03/26/2021   12:37:23   ( -69.28, 170.57) 03/26/2021   12:36:09  ( -69.32, 170.49)    5.53                74