Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 1 7.  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)
 01/07/2021   17:20:37   ( -69.29,  99.31) 01/07/2021   17:21:17  ( -69.27,  99.38)    3.33                40
 01/07/2021   18:11:20   (  69.12, -93.14) 01/07/2021   18:10:45  (  69.11, -93.18)    1.66                35
 01/10/2021   09:36:58   ( -69.29,-144.76) 01/10/2021   09:37:45  ( -69.28,-144.73)    1.37                47
 01/10/2021   10:27:42   (  69.17,  22.72) 01/10/2021   10:27:12  (  69.17,  22.77)    2.23                30
 01/10/2021   11:18:05   ( -68.11,-168.55) 01/10/2021   11:16:58  ( -68.17,-170.83)   94.78                67
 01/13/2021   01:53:19   ( -69.28, -28.83) 01/13/2021   01:54:13  ( -69.28, -28.85)    1.26                54
 01/13/2021   02:44:03   (  69.17, 138.65) 01/13/2021   02:43:40  (  69.17, 138.65)    0.08                23
 01/13/2021   03:34:31   ( -68.38, -52.96) 01/13/2021   03:33:22  ( -68.39, -54.69)   70.58                69
 01/15/2021   18:09:41   ( -69.34,  87.03) 01/15/2021   18:10:40  ( -69.33,  87.09)    2.79                59
 01/15/2021   19:00:24   (  69.17,-105.43) 01/15/2021   19:00:08  (  69.16,-105.48)    2.39                16
 01/15/2021   19:50:56   ( -68.59,  62.68) 01/15/2021   19:49:45  ( -68.67,  61.53)   47.57                71
 01/18/2021   10:26:01   ( -69.34,-157.05) 01/18/2021   10:27:07  ( -69.32,-157.04)    2.02                66
 01/18/2021   11:16:45   (  69.22,  10.42) 01/18/2021   11:16:34  (  69.20,  10.45)    2.48                11
 01/18/2021   12:07:20   ( -68.81, 178.32) 01/18/2021   12:06:08  ( -68.88, 177.67)   27.38                72
 01/21/2021   02:42:23   ( -69.39, -41.20) 01/21/2021   02:43:34  ( -69.36, -41.11)    5.01                71
 01/21/2021   03:33:06   (  69.22, 126.35) 01/21/2021   03:33:01  (  69.24, 126.38)    2.26                 5