Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 3 12.  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   01:34:18   ( -69.45, -23.97) 03/13/2021   01:35:00  ( -69.45, -24.01)    1.50                42
 03/13/2021   02:25:01   (  69.32, 143.52) 03/13/2021   02:24:27  (  69.35, 143.50)    3.22                34
 03/15/2021   17:50:39   ( -69.49,  91.90) 03/15/2021   17:51:27  ( -69.47,  91.89)    2.44                48
 03/15/2021   18:41:22   (  69.36,-100.61) 03/15/2021   18:40:54  (  69.36,-100.61)    1.06                28
 03/15/2021   19:31:46   ( -68.32,  68.14) 03/15/2021   19:30:40  ( -68.36,  65.76)   97.59                66
 03/18/2021   10:07:00   ( -69.53,-152.22) 03/18/2021   10:07:53  ( -69.53,-152.15)    2.68                53
 03/18/2021   10:57:42   (  69.36,  15.33) 03/18/2021   10:57:21  (  69.36,  15.27)    2.59                21
 03/18/2021   11:48:11   ( -68.57,-176.26) 03/18/2021   11:47:02  ( -68.64,-178.01)   71.35                69
 03/21/2021   02:23:20   ( -69.52, -36.27) 03/21/2021   02:24:20  ( -69.53, -36.27)    1.31                60
 03/21/2021   03:14:03   (  69.40, 131.20) 03/21/2021   03:13:47  (  69.41, 131.22)    1.08                16
 03/21/2021   04:04:36   ( -68.83, -60.67) 03/21/2021   04:03:25  ( -68.87, -61.85)   47.51                71
 03/23/2021   18:39:39   ( -69.51,  79.67) 03/23/2021   18:40:46  ( -69.52,  79.60)    3.25                67
 03/23/2021   19:30:22   (  69.40,-112.86) 03/23/2021   19:30:13  (  69.40,-112.91)    1.97                 9
 03/23/2021   20:20:59   ( -69.03,  54.98) 03/23/2021   20:19:47  ( -69.08,  54.30)   27.44                72