Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 10 3.  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)
 10/05/2021   12:25:40   (  70.33,  -6.63) 10/05/2021   12:26:32  (  70.31,  -6.65)    2.23                52
 10/05/2021   13:16:21   ( -70.24, 160.84) 10/05/2021   13:16:01  ( -70.25, 160.90)    2.71                20
 10/05/2021   14:06:49   (  69.28, -30.41) 10/05/2021   14:05:43  (  69.32, -32.74)   91.57                66
 10/08/2021   04:41:58   (  70.35, 109.28) 10/08/2021   04:42:57  (  70.35, 109.29)    0.57                59
 10/08/2021   05:32:39   ( -70.26, -83.25) 10/08/2021   05:32:27  ( -70.24, -83.24)    2.41                12
 10/08/2021   06:23:12   (  69.57,  85.12) 10/08/2021   06:22:03  (  69.63,  83.56)   60.76                69
 10/10/2021   20:58:16   (  70.38,-134.81) 10/10/2021   20:59:22  (  70.38,-134.79)    0.82                66
 10/10/2021   21:48:57   ( -70.28,  32.67) 10/10/2021   21:48:52  ( -70.27,  32.69)    1.41                 5
 10/10/2021   22:39:35   (  69.86,-159.37) 10/10/2021   22:38:23  (  69.94,-160.14)   30.69                72
 10/13/2021   13:14:34   (  70.46, -18.99) 10/13/2021   13:15:45  (  70.46, -18.79)    7.52                71
 10/13/2021   14:05:14   ( -70.31, 148.58) 10/13/2021   14:05:16  ( -70.30, 148.61)    1.56                 2
 10/13/2021   14:55:56   (  70.10, -43.79) 10/13/2021   14:54:44  (  70.13, -43.99)    8.24                72
 10/16/2021   05:30:57   (  70.76,  96.48) 10/16/2021   05:32:07  (  70.64,  97.36)   34.99                70
 10/16/2021   06:21:32   ( -70.34, -95.52) 10/16/2021   06:21:41  ( -70.32, -95.48)    2.22                 9
 10/16/2021   07:12:15   (  70.18,  72.03) 10/16/2021   07:11:08  (  70.20,  72.00)    2.25                67