Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 3 24.  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)
 03/26/2021   10:56:00   ( -69.60,-164.53) 03/26/2021   10:57:11  ( -69.58,-164.45)    3.78                71
 03/26/2021   11:46:42   (  69.43,   3.03) 03/26/2021   11:46:39  (  69.42,   2.98)    2.37                 3
 03/26/2021   12:37:22   ( -69.23, 170.64) 03/26/2021   12:36:10  ( -69.25, 170.40)    9.75                72
 03/29/2021   03:12:24   ( -69.81, -48.91) 03/29/2021   03:13:35  ( -69.73, -48.37)   22.77                71
 03/29/2021   04:03:02   (  69.43, 118.96) 03/29/2021   04:03:05  (  69.45, 118.91)    2.83                 3
 03/29/2021   04:53:44   ( -69.34, -73.58) 03/29/2021   04:52:35  ( -69.34, -73.60)    1.05                69
 03/31/2021   19:28:48   ( -70.02,  66.70) 03/31/2021   19:29:58  ( -69.92,  67.79)   42.78                70
 03/31/2021   20:19:23   (  69.49,-125.19) 03/31/2021   20:19:31  (  69.48,-125.17)    1.69                 8
 03/31/2021   21:10:05   ( -69.39,  42.27) 03/31/2021   21:09:01  ( -69.37,  42.32)    2.91                64
 04/03/2021   11:45:12   ( -70.24,-177.70) 04/03/2021   11:46:21  ( -70.11,-176.06)   63.30                69
 04/03/2021   12:35:43   (  69.50,  -9.27) 04/03/2021   12:35:57  (  69.50,  -9.26)    0.41                14
 04/03/2021   13:26:25   ( -69.40, 158.20) 04/03/2021   13:25:27  ( -69.40, 158.24)    1.57                58
 04/06/2021   04:01:35   ( -70.46, -62.11) 04/06/2021   04:02:42  ( -70.35, -59.84)   85.71                67
 04/06/2021   04:52:02   (  69.51, 106.65) 04/06/2021   04:52:22  (  69.52, 106.65)    0.60                20
 04/06/2021   05:42:44   ( -69.41, -85.89) 04/06/2021   05:41:52  ( -69.42, -85.86)    1.42                52