Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 3 31.  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,  66.69) 03/31/2021   19:29:58  ( -69.91,  67.76)   43.11                70
 03/31/2021   20:19:23   (  69.49,-125.19) 03/31/2021   20:19:31  (  69.47,-125.18)    1.96                 8
 03/31/2021   21:10:04   ( -69.35,  42.34) 03/31/2021   21:09:01  ( -69.36,  42.30)    1.98                63
 04/03/2021   11:45:12   ( -70.24,-177.70) 04/03/2021   11:46:21  ( -70.10,-176.09)   63.06                69
 04/03/2021   12:35:43   (  69.50,  -9.26) 04/03/2021   12:35:57  (  69.50,  -9.27)    0.31                14
 04/03/2021   13:26:25   ( -69.40, 158.19) 04/03/2021   13:25:27  ( -69.38, 158.21)    2.11                58
 04/06/2021   04:01:36   ( -70.46, -62.11) 04/06/2021   04:02:43  ( -70.34, -59.86)   84.83                67
 04/06/2021   04:52:03   (  69.50, 106.66) 04/06/2021   04:52:23  (  69.51, 106.64)    1.73                20
 04/06/2021   05:42:45   ( -69.41, -85.88) 04/06/2021   05:41:53  ( -69.40, -85.88)    0.17                52
 04/08/2021   21:08:22   (  69.51,-137.41) 04/08/2021   21:08:48  (  69.53,-137.47)    2.75                26
 04/08/2021   21:59:04   ( -69.41,  30.05) 04/08/2021   21:58:18  ( -69.42,  30.02)    1.13                46
 04/11/2021   13:24:43   (  69.57, -21.57) 04/11/2021   13:25:13  (  69.59, -21.50)    3.07                30
 04/11/2021   14:15:24   ( -69.42, 145.97) 04/11/2021   14:14:44  ( -69.43, 145.92)    2.08                40