Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 3 30.  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)
 03/31/2021   19:28:48   ( -70.03,  66.70) 03/31/2021   19:29:58  ( -69.91,  67.77)   42.98                70
 03/31/2021   20:19:23   (  69.49,-125.19) 03/31/2021   20:19:31  (  69.48,-125.17)    1.37                 8
 03/31/2021   21:10:04   ( -69.34,  42.34) 03/31/2021   21:09:01  ( -69.36,  42.31)    2.57                63
 04/03/2021   11:45:12   ( -70.24,-177.70) 04/03/2021   11:46:21  ( -70.10,-176.08)   63.23                69
 04/03/2021   12:35:43   (  69.50,  -9.26) 04/03/2021   12:35:57  (  69.50,  -9.26)    0.36                14
 04/03/2021   13:26:25   ( -69.40, 158.19) 04/03/2021   13:25:27  ( -69.39, 158.22)    1.85                58
 04/06/2021   04:01:36   ( -70.46, -62.11) 04/06/2021   04:02:43  ( -70.34, -59.85)   85.33                67
 04/06/2021   04:52:03   (  69.51, 106.66) 04/06/2021   04:52:23  (  69.52, 106.64)    1.25                20
 04/06/2021   05:42:44   ( -69.41, -85.89) 04/06/2021   05:41:52  ( -69.41, -85.87)    0.62                52
 04/08/2021   21:08:22   (  69.52,-137.43) 04/08/2021   21:08:48  (  69.53,-137.46)    1.64                26
 04/08/2021   21:59:04   ( -69.42,  30.03) 04/08/2021   21:58:18  ( -69.42,  30.03)    0.12                46
 04/11/2021   13:24:42   (  69.54, -21.51) 04/11/2021   13:25:14  (  69.53, -21.57)    2.31                32
 04/11/2021   14:15:24   ( -69.44, 145.95) 04/11/2021   14:14:44  ( -69.43, 145.92)    1.18                40