Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 9 29.  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)
 09/30/2021   03:53:05   (  70.29, 121.53) 09/30/2021   03:53:42  (  70.26, 121.52)    3.60                37
 09/30/2021   04:43:46   ( -70.21, -71.01) 09/30/2021   04:43:11  ( -70.20, -70.93)    2.85                35
 10/02/2021   20:09:23   (  70.31,-122.55) 10/02/2021   20:10:07  (  70.31,-122.53)    0.91                44
 10/02/2021   21:00:04   ( -70.22,  44.92) 10/02/2021   20:59:37  ( -70.20,  44.95)    2.48                27
 10/05/2021   12:25:40   (  70.33,  -6.64) 10/05/2021   12:26:31  (  70.36,  -6.58)    3.15                51
 10/05/2021   13:16:21   ( -70.24, 160.84) 10/05/2021   13:16:01  ( -70.25, 160.89)    2.37                20
 10/05/2021   14:06:49   (  69.28, -30.42) 10/05/2021   14:05:42  (  69.36, -32.68)   89.09                67
 10/08/2021   04:41:58   (  70.36, 109.28) 10/08/2021   04:42:57  (  70.34, 109.27)    2.23                59
 10/08/2021   05:32:39   ( -70.26, -83.25) 10/08/2021   05:32:27  ( -70.23, -83.25)    2.91                12
 10/08/2021   06:23:12   (  69.57,  85.11) 10/08/2021   06:22:03  (  69.62,  83.55)   60.78                69
 10/10/2021   20:58:16   (  70.38,-134.82) 10/10/2021   20:59:22  (  70.37,-134.80)    1.91                66
 10/10/2021   21:48:57   ( -70.28,  32.67) 10/10/2021   21:48:52  ( -70.27,  32.68)    1.86                 5
 10/10/2021   22:39:35   (  69.86,-159.38) 10/10/2021   22:38:23  (  69.93,-160.15)   30.51                72