Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 10 15.  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)
 10/16/2021   05:30:57   (  70.74,  96.50) 10/16/2021   05:32:08  (  70.60,  97.30)   33.26                71
 10/16/2021   06:21:32   ( -70.33, -95.52) 10/16/2021   06:21:41  ( -70.32, -95.48)    1.83                 9
 10/16/2021   07:12:16   (  70.22,  71.97) 10/16/2021   07:11:08  (  70.22,  72.01)    1.83                68
 10/18/2021   21:47:19   (  70.99,-147.96) 10/18/2021   21:48:28  (  70.88,-146.39)   58.16                69
 10/18/2021   22:37:49   ( -70.31,  20.47) 10/18/2021   22:38:06  ( -70.33,  20.42)    2.94                17
 10/18/2021   23:28:33   (  70.21,-172.06) 10/18/2021   23:27:33  (  70.23,-172.09)    2.35                60
 10/21/2021   14:03:41   (  71.29, -32.53) 10/21/2021   14:04:47  (  71.16, -30.08)   88.83                66
 10/21/2021   14:54:06   ( -70.35, 136.36) 10/21/2021   14:54:30  ( -70.34, 136.31)    2.36                24
 10/21/2021   15:44:50   (  70.25, -56.17) 10/21/2021   15:43:57  (  70.23, -56.21)    2.80                53
 10/24/2021   07:10:24   ( -70.39,-107.75) 10/24/2021   07:10:54  ( -70.39,-107.73)    0.79                30
 10/24/2021   08:01:08   (  70.29,  59.71) 10/24/2021   08:00:21  (  70.28,  59.75)    2.21                47
 10/26/2021   23:26:42   ( -70.43,   8.14) 10/26/2021   23:27:18  ( -70.44,   8.22)    3.15                36
 10/27/2021   00:17:25   (  70.29, 175.67) 10/27/2021   00:16:46  (  70.27, 175.61)    3.17                39