Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 10 12.  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)
 10/13/2021   13:14:34   (  70.46, -18.99) 10/13/2021   13:15:45  (  70.46, -18.79)    7.30                71
 10/13/2021   14:05:14   ( -70.32, 148.56) 10/13/2021   14:05:16  ( -70.29, 148.59)    3.28                 2
 10/13/2021   14:55:56   (  70.10, -43.79) 10/13/2021   14:54:44  (  70.13, -43.99)    8.49                72
 10/16/2021   05:30:56   (  70.70,  96.57) 10/16/2021   05:32:07  (  70.64,  97.35)   29.72                71
 10/16/2021   06:21:31   ( -70.29, -95.45) 10/16/2021   06:21:41  ( -70.31, -95.50)    2.76                10
 10/16/2021   07:12:15   (  70.18,  72.03) 10/16/2021   07:11:08  (  70.20,  71.98)    2.40                67
 10/18/2021   21:47:19   (  71.00,-147.98) 10/18/2021   21:48:28  (  70.86,-146.43)   58.19                69
 10/18/2021   22:37:49   ( -70.32,  20.46) 10/18/2021   22:38:06  ( -70.31,  20.39)    2.70                17
 10/18/2021   23:28:33   (  70.22,-172.07) 10/18/2021   23:27:33  (  70.20,-172.13)    2.61                60
 10/21/2021   14:03:41   (  71.24, -32.44) 10/21/2021   14:04:48  (  71.13, -30.13)   84.01                67
 10/21/2021   14:54:07   ( -70.35, 136.36) 10/21/2021   14:54:30  ( -70.37, 136.35)    2.41                23
 10/21/2021   15:44:51   (  70.25, -56.17) 10/21/2021   15:43:57  (  70.25, -56.17)    0.41                54
 10/24/2021   07:10:24   ( -70.38,-107.74) 10/24/2021   07:10:54  ( -70.36,-107.78)    2.55                30
 10/24/2021   08:01:08   (  70.29,  59.72) 10/24/2021   08:00:20  (  70.30,  59.78)    2.53                48