Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2020 12 16.  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)
 12/17/2020   06:19:06   (  69.22,  84.68) 12/17/2020   06:20:04  (  69.24,  84.69)    1.58                58
 12/17/2020   07:09:47   ( -69.09,-107.82) 12/17/2020   07:09:34  ( -69.12,-107.83)    3.14                13
 12/17/2020   08:00:20   (  68.42,  60.40) 12/17/2020   07:59:11  (  68.46,  58.99)   57.93                69
 12/19/2020   22:35:28   (  69.26,-159.45) 12/19/2020   22:36:31  (  69.24,-159.43)    2.59                63
 12/19/2020   23:26:09   ( -69.13,   8.05) 12/19/2020   23:26:01  ( -69.13,   8.06)    0.67                 8
 12/20/2020   00:16:45   (  68.62, 176.06) 12/20/2020   00:15:34  (  68.68, 175.15)   37.84                71
 12/22/2020   14:51:48   (  69.25, -43.50) 12/22/2020   14:52:57  (  69.23, -43.55)    2.32                69
 12/22/2020   15:42:29   ( -69.12, 124.00) 12/22/2020   15:42:27  ( -69.12, 123.94)    2.25                 2
 12/22/2020   16:33:09   (  68.82, -68.28) 12/22/2020   16:31:56  (  68.90, -68.70)   19.06                73
 12/25/2020   07:08:11   (  69.34,  72.29) 12/25/2020   07:09:22  (  69.33,  72.47)    7.03                71
 12/25/2020   07:58:51   ( -69.16,-120.14) 12/25/2020   07:58:53  ( -69.17,-120.11)    1.62                 2
 12/25/2020   08:49:34   (  69.02,  47.37) 12/25/2020   08:48:21  (  69.00,  47.31)    2.99                73
 12/27/2020   23:24:36   (  69.54,-172.08) 12/27/2020   23:25:47  (  69.43,-171.52)   25.13                71
 12/28/2020   00:15:12   ( -69.15,  -4.20) 12/28/2020   00:15:20  ( -69.16,  -4.25)    2.00                 8
 12/28/2020   01:05:56   (  69.06, 163.23) 12/28/2020   01:04:47  (  69.04, 163.25)    2.69                69