Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 1 4.  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)
 01/05/2021   01:04:16   ( -69.24, -16.54) 01/05/2021   01:04:51  ( -69.21, -16.57)    2.86                35
 01/05/2021   01:55:00   (  69.12, 150.93) 01/05/2021   01:54:18  (  69.11, 150.94)    1.45                42
 01/07/2021   17:20:37   ( -69.29,  99.31) 01/07/2021   17:21:17  ( -69.28,  99.39)    3.10                40
 01/07/2021   18:11:20   (  69.12, -93.14) 01/07/2021   18:10:45  (  69.12, -93.18)    1.49                35
 01/10/2021   09:36:58   ( -69.29,-144.76) 01/10/2021   09:37:45  ( -69.28,-144.72)    1.43                47
 01/10/2021   10:27:42   (  69.17,  22.71) 01/10/2021   10:27:12  (  69.17,  22.78)    2.63                30
 01/10/2021   11:18:05   ( -68.11,-168.55) 01/10/2021   11:16:58  ( -68.18,-170.83)   94.43                67
 01/13/2021   01:53:19   ( -69.29, -28.84) 01/13/2021   01:54:13  ( -69.28, -28.85)    0.82                54
 01/13/2021   02:44:03   (  69.18, 138.63) 01/13/2021   02:43:40  (  69.17, 138.65)    1.10                23
 01/13/2021   03:34:31   ( -68.38, -52.97) 01/13/2021   03:33:22  ( -68.40, -54.68)   69.93                69
 01/15/2021   18:09:40   ( -69.30,  87.09) 01/15/2021   18:10:41  ( -69.28,  87.03)    2.87                61
 01/15/2021   19:00:23   (  69.18,-105.45) 01/15/2021   19:00:07  (  69.16,-105.48)    2.58                16
 01/15/2021   19:50:55   ( -68.60,  62.67) 01/15/2021   19:49:44  ( -68.67,  61.53)   46.54                71