Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 1 10.  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)
 01/10/2021   09:36:58   ( -69.28,-144.74) 01/10/2021   09:37:45  ( -69.30,-144.71)    2.61                47
 01/10/2021   10:27:42   (  69.16,  22.73) 01/10/2021   10:27:13  (  69.14,  22.73)    1.95                29
 01/10/2021   11:18:05   ( -68.10,-168.54) 01/10/2021   11:16:59  ( -68.14,-170.88)   97.07                66
 01/13/2021   01:53:18   ( -69.28, -28.82) 01/13/2021   01:54:12  ( -69.30, -28.83)    1.93                54
 01/13/2021   02:44:02   (  69.16, 138.66) 01/13/2021   02:43:40  (  69.14, 138.61)    3.40                22
 01/13/2021   03:34:30   ( -68.38, -52.96) 01/13/2021   03:33:21  ( -68.41, -54.66)   69.96                69
 01/15/2021   18:09:39   ( -69.29,  87.10) 01/15/2021   18:10:40  ( -69.29,  87.05)    2.16                61
 01/15/2021   19:00:23   (  69.17,-105.43) 01/15/2021   19:00:07  (  69.18,-105.45)    2.10                16
 01/15/2021   19:50:55   ( -68.60,  62.68) 01/15/2021   19:49:45  ( -68.63,  61.48)   48.67                70
 01/18/2021   10:26:01   ( -69.35,-157.06) 01/18/2021   10:27:07  ( -69.34,-157.01)    2.19                66
 01/18/2021   11:16:45   (  69.23,  10.41) 01/18/2021   11:16:34  (  69.23,  10.48)    2.89                11
 01/18/2021   12:07:20   ( -68.82, 178.31) 01/18/2021   12:06:08  ( -68.90, 177.70)   26.12                72
 01/21/2021   02:42:23   ( -69.41, -41.23) 01/21/2021   02:43:34  ( -69.38, -41.08)    6.83                71
 01/21/2021   03:33:05   (  69.19, 126.40) 01/21/2021   03:33:02  (  69.21, 126.34)    3.06                 3
 01/21/2021   04:23:46   ( -69.10, -66.15) 01/21/2021   04:22:32  ( -69.11, -66.15)    1.59                74
 01/23/2021   18:58:47   ( -69.64,  74.37) 01/23/2021   18:59:58  ( -69.53,  75.00)   27.26                71
 01/23/2021   19:49:26   (  69.26,-117.77) 01/23/2021   19:49:28  (  69.25,-117.73)    2.36                 2
 01/23/2021   20:40:06   ( -69.11,  49.76) 01/23/2021   20:38:59  ( -69.09,  49.70)    3.04                67