Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2020 12 11.  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)
 12/11/2020   21:46:23   (  69.20,-147.14) 12/11/2020   21:47:10  (  69.22,-147.10)    2.36                47
 12/11/2020   22:37:04   ( -69.06,  20.37) 12/11/2020   22:36:41  ( -69.05,  20.31)    2.98                23
 12/11/2020   23:27:30   (  68.02,-170.94) 12/11/2020   23:26:24  (  68.05,-173.27)   96.96                66
 12/14/2020   14:02:45   (  69.23, -31.26) 12/14/2020   14:03:37  (  69.23, -31.21)    2.45                52
 12/14/2020   14:53:26   ( -69.10, 136.25) 12/14/2020   14:53:07  ( -69.12, 136.28)    2.54                19
 12/14/2020   15:43:55   (  68.22, -55.26) 12/14/2020   15:42:47  (  68.28, -57.11)   76.33                68
 12/17/2020   06:19:06   (  69.22,  84.68) 12/17/2020   06:20:04  (  69.23,  84.68)    1.58                58
 12/17/2020   07:09:48   ( -69.13,-107.88) 12/17/2020   07:09:34  ( -69.12,-107.82)    2.58                14
 12/17/2020   08:00:20   (  68.41,  60.40) 12/17/2020   07:59:11  (  68.45,  58.98)   58.26                69
 12/19/2020   22:35:27   (  69.26,-159.45) 12/19/2020   22:36:30  (  69.23,-159.44)    3.15                63
 12/19/2020   23:26:08   ( -69.12,   8.06) 12/19/2020   23:26:00  ( -69.12,   8.06)    0.23                 8
 12/20/2020   00:16:44   (  68.62, 176.07) 12/20/2020   00:15:33  (  68.67, 175.14)   38.13                71
 12/22/2020   14:51:48   (  69.25, -43.50) 12/22/2020   14:52:56  (  69.27, -43.49)    3.22                68
 12/22/2020   15:42:29   ( -69.11, 124.00) 12/22/2020   15:42:27  ( -69.11, 123.93)    2.80                 2
 12/22/2020   16:33:09   (  68.82, -68.28) 12/22/2020   16:31:56  (  68.89, -68.71)   18.85                73