Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 9 30.  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   03:53:04   (  70.28, 121.56) 09/30/2021   03:53:41  (  70.28, 121.55)    1.02                37
 09/30/2021   04:43:45   ( -70.19, -70.98) 09/30/2021   04:43:11  ( -70.17, -70.98)    2.22                34
 10/02/2021   20:09:22   (  70.29,-122.52) 10/02/2021   20:10:07  (  70.28,-122.57)    2.57                45
 10/02/2021   21:00:03   ( -70.20,  44.94) 10/02/2021   20:59:36  ( -70.22,  44.98)    2.36                27
 10/05/2021   12:25:40   (  70.32,  -6.61) 10/05/2021   12:26:32  (  70.33,  -6.63)    1.20                52
 10/05/2021   13:16:21   ( -70.22, 160.86) 10/05/2021   13:16:02  ( -70.22, 160.85)    1.03                19
 10/05/2021   14:06:50   (  69.32, -30.47) 10/05/2021   14:05:43  (  69.33, -32.72)   88.31                67
 10/08/2021   04:41:58   (  70.34, 109.30) 10/08/2021   04:42:57  (  70.36, 109.31)    2.35                59
 10/08/2021   05:32:39   ( -70.24, -83.22) 10/08/2021   05:32:27  ( -70.26, -83.21)    1.43                12
 10/08/2021   06:23:12   (  69.55,  85.13) 10/08/2021   06:22:03  (  69.65,  83.58)   61.02                69
 10/10/2021   20:58:15   (  70.37,-134.79) 10/10/2021   20:59:21  (  70.40,-134.76)    2.98                66
 10/10/2021   21:48:56   ( -70.27,  32.69) 10/10/2021   21:48:51  ( -70.29,  32.72)    2.79                 5
 10/10/2021   22:39:34   (  69.85,-159.35) 10/10/2021   22:38:23  (  69.90,-160.19)   32.55                71
 10/13/2021   13:14:34   (  70.45, -18.98) 10/13/2021   13:15:46  (  70.42, -18.85)    6.13                72
 10/13/2021   14:05:14   ( -70.29, 148.60) 10/13/2021   14:05:16  ( -70.32, 148.64)    3.18                 2
 10/13/2021   14:55:57   (  70.14, -43.86) 10/13/2021   14:54:44  (  70.15, -43.96)    4.06                73