Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2020 12 14.  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)
 12/14/2020   14:02:44   (  69.21, -31.23) 12/14/2020   14:03:37  (  69.21, -31.23)    0.27                53
 12/14/2020   14:53:25   ( -69.08, 136.28) 12/14/2020   14:53:07  ( -69.09, 136.25)    2.04                18
 12/14/2020   15:43:55   (  68.24, -55.30) 12/14/2020   15:42:47  (  68.26, -57.13)   75.59                68
 12/17/2020   06:19:05   (  69.20,  84.72) 12/17/2020   06:20:04  (  69.21,  84.66)    3.11                59
 12/17/2020   07:09:47   ( -69.12,-107.85) 12/17/2020   07:09:34  ( -69.10,-107.85)    1.57                13
 12/17/2020   08:00:20   (  68.45,  60.36) 12/17/2020   07:59:10  (  68.49,  59.03)   54.78                70
 12/19/2020   22:35:27   (  69.24,-159.42) 12/19/2020   22:36:31  (  69.22,-159.46)    2.98                64
 12/19/2020   23:26:08   ( -69.11,   8.09) 12/19/2020   23:26:01  ( -69.11,   8.04)    1.96                 7
 12/20/2020   00:16:45   (  68.65, 176.02) 12/20/2020   00:15:33  (  68.72, 175.19)   34.40                72
 12/22/2020   14:51:49   (  69.29, -43.56) 12/22/2020   14:52:57  (  69.27, -43.51)    3.08                68
 12/22/2020   15:42:30   ( -69.15, 123.94) 12/22/2020   15:42:27  ( -69.16, 123.99)    1.78                 3
 12/22/2020   16:33:09   (  68.80, -68.26) 12/22/2020   16:31:57  (  68.88, -68.73)   20.26                72
 12/25/2020   07:08:10   (  69.34,  72.30) 12/25/2020   07:09:22  (  69.31,  72.44)    6.30                72
 12/25/2020   07:58:50   ( -69.15,-120.13) 12/25/2020   07:58:53  ( -69.15,-120.14)    0.63                 3
 12/25/2020   08:49:33   (  69.02,  47.37) 12/25/2020   08:48:20  (  69.03,  47.36)    1.98                73
 12/27/2020   23:24:35   (  69.55,-172.09) 12/27/2020   23:25:46  (  69.46,-171.48)   25.66                71
 12/28/2020   00:15:12   ( -69.21,  -4.28) 12/28/2020   00:15:19  ( -69.19,  -4.20)    3.68                 7
 12/28/2020   01:05:55   (  69.07, 163.23) 12/28/2020   01:04:46  (  69.07, 163.29)    2.56                69