Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 10 13.  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, -18.80)    7.29                71
 10/13/2021   14:05:13   ( -70.27, 148.64) 10/13/2021   14:05:16  ( -70.29, 148.59)    3.09                 3
 10/13/2021   14:55:56   (  70.10, -43.79) 10/13/2021   14:54:44  (  70.13, -44.00)    8.44                72
 10/16/2021   05:30:56   (  70.70,  96.57) 10/16/2021   05:32:07  (  70.64,  97.35)   29.69                71
 10/16/2021   06:21:31   ( -70.29, -95.45) 10/16/2021   06:21:41  ( -70.30, -95.51)    2.62                10
 10/16/2021   07:12:15   (  70.18,  72.03) 10/16/2021   07:11:08  (  70.20,  71.98)    2.36                67
 10/18/2021   21:47:19   (  71.00,-147.97) 10/18/2021   21:48:28  (  70.86,-146.43)   58.09                69
 10/18/2021   22:37:49   ( -70.32,  20.46) 10/18/2021   22:38:06  ( -70.31,  20.38)    2.92                17
 10/18/2021   23:28:33   (  70.21,-172.07) 10/18/2021   23:27:33  (  70.20,-172.13)    2.78                60
 10/21/2021   14:03:41   (  71.24, -32.44) 10/21/2021   14:04:48  (  71.13, -30.13)   83.81                67
 10/21/2021   14:54:07   ( -70.35, 136.37) 10/21/2021   14:54:30  ( -70.36, 136.35)    2.24                23
 10/21/2021   15:44:51   (  70.25, -56.17) 10/21/2021   15:43:57  (  70.25, -56.17)    0.33                54
 10/24/2021   07:10:24   ( -70.38,-107.73) 10/24/2021   07:10:54  ( -70.36,-107.78)    2.82                30
 10/24/2021   08:01:08   (  70.28,  59.72) 10/24/2021   08:00:20  (  70.30,  59.77)    2.32                48
 10/26/2021   23:26:42   ( -70.41,   8.17) 10/26/2021   23:27:18  ( -70.39,   8.16)    1.41                36
 10/27/2021   00:17:25   (  70.27, 175.70) 10/27/2021   00:16:45  (  70.28, 175.63)    2.56                40