Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 3 13.  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   02:25:02   (  69.36, 143.47) 03/13/2021   02:24:27  (  69.37, 143.52)    2.32                35
 03/15/2021   17:50:39   ( -69.47,  91.92) 03/15/2021   17:51:27  ( -69.48,  91.91)    1.18                48
 03/15/2021   18:41:22   (  69.35,-100.59) 03/15/2021   18:40:54  (  69.37,-100.59)    2.60                28
 03/15/2021   19:31:47   ( -68.36,  68.09) 03/15/2021   19:30:40  ( -68.38,  65.78)   94.45                67
 03/18/2021   10:06:59   ( -69.52,-152.21) 03/18/2021   10:07:53  ( -69.49,-152.21)    3.25                54
 03/18/2021   10:57:42   (  69.40,  15.28) 03/18/2021   10:57:20  (  69.37,  15.29)    2.74                22
 03/18/2021   11:48:10   ( -68.56,-176.25) 03/18/2021   11:47:02  ( -68.60,-178.06)   73.79                68
 03/21/2021   02:23:19   ( -69.51, -36.26) 03/21/2021   02:24:19  ( -69.54, -36.26)    3.58                60
 03/21/2021   03:14:02   (  69.40, 131.21) 03/21/2021   03:13:46  (  69.43, 131.24)    3.42                16
 03/21/2021   04:04:35   ( -68.82, -60.66) 03/21/2021   04:03:24  ( -68.88, -61.84)   47.60                71
 03/23/2021   18:39:40   ( -69.56,  79.60) 03/23/2021   18:40:46  ( -69.53,  79.62)    2.60                66
 03/23/2021   19:30:22   (  69.40,-112.85) 03/23/2021   19:30:13  (  69.42,-112.90)    2.80                 9
 03/23/2021   20:20:59   ( -69.03,  54.98) 03/23/2021   20:19:47  ( -69.09,  54.32)   27.58                72
 03/26/2021   10:56:01   ( -69.61,-164.54) 03/26/2021   10:57:12  ( -69.58,-164.45)    4.97                71
 03/26/2021   11:46:43   (  69.45,   3.00) 03/26/2021   11:46:39  (  69.46,   3.04)    1.55                 4
 03/26/2021   12:37:23   ( -69.24, 170.62) 03/26/2021   12:36:11  ( -69.25, 170.39)    9.09                72