Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 3 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)
 03/13/2021   01:34:19   ( -69.46, -23.99) 03/13/2021   01:35:01  ( -69.44, -24.03)    2.89                42
 03/13/2021   02:25:02   (  69.34, 143.50) 03/13/2021   02:24:28  (  69.33, 143.47)    1.09                34
 03/15/2021   17:50:39   ( -69.50,  91.88) 03/15/2021   17:51:26  ( -69.51,  91.94)    2.25                47
 03/15/2021   18:41:22   (  69.38,-100.63) 03/15/2021   18:40:53  (  69.39,-100.56)    3.08                29
 03/15/2021   19:31:46   ( -68.33,  68.12) 03/15/2021   19:30:39  ( -68.40,  65.81)   94.89                67
 03/18/2021   10:06:59   ( -69.49,-152.17) 03/18/2021   10:07:53  ( -69.51,-152.17)    2.51                54
 03/18/2021   10:57:42   (  69.37,  15.31) 03/18/2021   10:57:20  (  69.40,  15.32)    2.64                22
 03/18/2021   11:48:11   ( -68.59,-176.28) 03/18/2021   11:47:02  ( -68.63,-178.03)   71.03                69
 03/21/2021   02:23:20   ( -69.53, -36.30) 03/21/2021   02:24:20  ( -69.51, -36.29)    2.18                60
 03/21/2021   03:14:03   (  69.42, 131.18) 03/21/2021   03:13:47  (  69.39, 131.20)    3.04                16
 03/21/2021   04:04:35   ( -68.79, -60.62) 03/21/2021   04:03:25  ( -68.85, -61.87)   50.72                70
 03/23/2021   18:39:40   ( -69.52,  79.65) 03/23/2021   18:40:47  ( -69.51,  79.58)    3.23                67
 03/23/2021   19:30:23   (  69.42,-112.88) 03/23/2021   19:30:13  (  69.44,-112.86)    3.03                10
 03/23/2021   20:21:00   ( -69.05,  54.96) 03/23/2021   20:19:48  ( -69.07,  54.28)   26.90                72