Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 3 22.  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)
 03/23/2021   18:39:40   ( -69.55,  79.62) 03/23/2021   18:40:46  ( -69.53,  79.61)    1.74                66
 03/23/2021   19:30:23   (  69.43,-112.90) 03/23/2021   19:30:13  (  69.42,-112.89)    0.77                10
 03/23/2021   20:20:59   ( -69.02,  55.00) 03/23/2021   20:19:47  ( -69.09,  54.31)   28.53                72
 03/26/2021   10:56:01   ( -69.59,-164.52) 03/26/2021   10:57:12  ( -69.57,-164.45)    3.06                71
 03/26/2021   11:46:43   (  69.42,   3.04) 03/26/2021   11:46:40  (  69.41,   2.97)    3.08                 3
 03/26/2021   12:37:23   ( -69.22, 170.65) 03/26/2021   12:36:11  ( -69.24, 170.39)   10.48                72
 03/29/2021   03:12:24   ( -69.79, -48.88) 03/29/2021   03:13:35  ( -69.72, -48.37)   21.28                71
 03/29/2021   04:03:03   (  69.47, 118.90) 03/29/2021   04:03:05  (  69.44, 118.90)    3.30                 2
 03/29/2021   04:53:44   ( -69.32, -73.56) 03/29/2021   04:52:35  ( -69.34, -73.61)    2.70                69
 03/31/2021   19:28:48   ( -70.00,  66.74) 03/31/2021   19:29:59  ( -69.86,  67.70)   39.73                71
 03/31/2021   20:19:23   (  69.47,-125.16) 03/31/2021   20:19:31  (  69.47,-125.18)    0.94                 8
 03/31/2021   21:10:05   ( -69.37,  42.31) 03/31/2021   21:09:01  ( -69.37,  42.31)    0.29                64
 04/03/2021   11:45:12   ( -70.20,-177.64) 04/03/2021   11:46:21  ( -70.11,-176.07)   60.29                69
 04/03/2021   12:35:44   (  69.52,  -9.30) 04/03/2021   12:35:57  (  69.49,  -9.27)    2.93                13
 04/03/2021   13:26:26   ( -69.41, 158.17) 04/03/2021   13:25:27  ( -69.39, 158.23)    3.24                59