Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 10 10.  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)
 10/10/2021   20:58:15   (  70.37,-134.79) 10/10/2021   20:59:22  (  70.35,-134.84)    3.11                67
 10/10/2021   21:48:56   ( -70.28,  32.68) 10/10/2021   21:48:51  ( -70.28,  32.70)    1.26                 5
 10/10/2021   22:39:34   (  69.84,-159.35) 10/10/2021   22:38:23  (  69.90,-160.19)   32.97                71
 10/13/2021   13:14:34   (  70.45, -18.97) 10/13/2021   13:15:46  (  70.42, -18.85)    5.40                72
 10/13/2021   14:05:14   ( -70.30, 148.59) 10/13/2021   14:05:16  ( -70.31, 148.62)    1.52                 2
 10/13/2021   14:55:57   (  70.14, -43.85) 10/13/2021   14:54:44  (  70.15, -43.97)    4.58                73
 10/16/2021   05:30:57   (  70.75,  96.50) 10/16/2021   05:32:08  (  70.60,  97.30)   33.48                71
 10/16/2021   06:21:32   ( -70.33, -95.51) 10/16/2021   06:21:41  ( -70.33, -95.47)    1.44                 9
 10/16/2021   07:12:16   (  70.23,  71.97) 10/16/2021   07:11:08  (  70.22,  72.01)    2.04                68
 10/18/2021   21:47:19   (  70.99,-147.96) 10/18/2021   21:48:28  (  70.88,-146.39)   58.29                69
 10/18/2021   22:37:50   ( -70.36,  20.39) 10/18/2021   22:38:06  ( -70.34,  20.43)    2.88                16
 10/18/2021   23:28:33   (  70.21,-172.06) 10/18/2021   23:27:33  (  70.22,-172.09)    2.12                60
 10/21/2021   14:03:41   (  71.29, -32.53) 10/21/2021   14:04:47  (  71.16, -30.08)   88.86                66
 10/21/2021   14:54:06   ( -70.34, 136.37) 10/21/2021   14:54:30  ( -70.34, 136.31)    2.09                24
 10/21/2021   15:44:50   (  70.25, -56.17) 10/21/2021   15:43:57  (  70.23, -56.21)    2.93                53