Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 3 21.  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)
 03/21/2021   03:14:02   (  69.38, 131.24) 03/21/2021   03:13:47  (  69.38, 131.18)    2.43                15
 03/21/2021   04:04:35   ( -68.81, -60.65) 03/21/2021   04:03:24  ( -68.88, -61.84)   48.29                71
 03/23/2021   18:39:40   ( -69.54,  79.62) 03/23/2021   18:40:46  ( -69.54,  79.62)    0.49                66
 03/23/2021   19:30:23   (  69.42,-112.90) 03/23/2021   19:30:13  (  69.43,-112.88)    0.82                10
 03/23/2021   20:20:59   ( -69.01,  55.01) 03/23/2021   20:19:47  ( -69.10,  54.32)   28.93                72
 03/26/2021   10:56:01   ( -69.58,-164.51) 03/26/2021   10:57:12  ( -69.58,-164.44)    2.54                71
 03/26/2021   11:46:42   (  69.42,   3.04) 03/26/2021   11:46:39  (  69.41,   2.98)    2.59                 3
 03/26/2021   12:37:23   ( -69.27, 170.58) 03/26/2021   12:36:09  ( -69.31, 170.47)    5.97                74
 03/29/2021   03:12:24   ( -69.79, -48.88) 03/29/2021   03:13:35  ( -69.73, -48.36)   20.89                71
 03/29/2021   04:03:03   (  69.47, 118.91) 03/29/2021   04:03:05  (  69.45, 118.91)    2.09                 2
 03/29/2021   04:53:45   ( -69.37, -73.63) 03/29/2021   04:52:35  ( -69.34, -73.60)    2.80                70
 03/31/2021   19:28:48   ( -69.99,  66.75) 03/31/2021   19:29:59  ( -69.87,  67.72)   39.36                71
 03/31/2021   20:19:23   (  69.46,-125.15) 03/31/2021   20:19:31  (  69.48,-125.17)    1.78                 8
 03/31/2021   21:10:05   ( -69.36,  42.31) 03/31/2021   21:09:01  ( -69.38,  42.33)    1.83                64
 04/03/2021   11:45:12   ( -70.20,-177.64) 04/03/2021   11:46:21  ( -70.12,-176.05)   60.34                69
 04/03/2021   12:35:44   (  69.52,  -9.29) 04/03/2021   12:35:57  (  69.51,  -9.25)    1.89                13
 04/03/2021   13:26:26   ( -69.41, 158.18) 04/03/2021   13:25:27  ( -69.40, 158.24)    2.65                59