Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 3 17.  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)
 03/18/2021   10:07:00   ( -69.52,-152.21) 03/18/2021   10:07:53  ( -69.53,-152.15)    3.04                53
 03/18/2021   10:57:43   (  69.40,  15.28) 03/18/2021   10:57:21  (  69.37,  15.29)    2.57                22
 03/18/2021   11:48:10   ( -68.56,-176.25) 03/18/2021   11:47:02  ( -68.59,-178.07)   74.10                68
 03/21/2021   02:23:19   ( -69.50, -36.26) 03/21/2021   02:24:19  ( -69.53, -36.27)    3.14                60
 03/21/2021   03:14:02   (  69.39, 131.22) 03/21/2021   03:13:47  (  69.37, 131.16)    3.38                15
 03/21/2021   04:04:35   ( -68.82, -60.66) 03/21/2021   04:03:24  ( -68.87, -61.85)   48.19                71
 03/23/2021   18:39:40   ( -69.55,  79.62) 03/23/2021   18:40:46  ( -69.53,  79.60)    2.26                66
 03/23/2021   19:30:23   (  69.43,-112.91) 03/23/2021   19:30:13  (  69.41,-112.90)    2.24                10
 03/23/2021   20:20:59   ( -69.02,  55.00) 03/23/2021   20:19:47  ( -69.09,  54.30)   28.65                72
 03/26/2021   10:56:01   ( -69.59,-164.51) 03/26/2021   10:57:12  ( -69.57,-164.46)    3.04                71
 03/26/2021   11:46:43   (  69.43,   3.04) 03/26/2021   11:46:39  (  69.45,   3.03)    2.98                 4
 03/26/2021   12:37:23   ( -69.22, 170.65) 03/26/2021   12:36:11  ( -69.24, 170.38)   10.69                72
 03/29/2021   03:12:25   ( -69.79, -48.88) 03/29/2021   03:13:36  ( -69.72, -48.38)   21.02                71
 03/29/2021   04:03:03   (  69.47, 118.90) 03/29/2021   04:03:04  (  69.49, 118.96)    2.88                 1
 03/29/2021   04:53:44   ( -69.32, -73.56) 03/29/2021   04:52:35  ( -69.33, -73.61)    2.87                69