Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 1 3.  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   01:04:15   ( -69.22, -16.52) 01/05/2021   01:04:50  ( -69.23, -16.56)    1.72                35
 01/05/2021   01:54:59   (  69.11, 150.95) 01/05/2021   01:54:17  (  69.12, 150.95)    1.55                42
 01/07/2021   17:20:37   ( -69.27,  99.34) 01/07/2021   17:21:17  ( -69.29,  99.41)    3.56                40
 01/07/2021   18:11:20   (  69.10, -93.12) 01/07/2021   18:10:45  (  69.13, -93.16)    3.06                35
 01/10/2021   09:36:58   ( -69.27,-144.73) 01/10/2021   09:37:45  ( -69.29,-144.71)    3.07                47
 01/10/2021   10:27:42   (  69.16,  22.74) 01/10/2021   10:27:13  (  69.13,  22.72)    3.26                29
 01/10/2021   11:18:05   ( -68.09,-168.53) 01/10/2021   11:16:59  ( -68.13,-170.88)   97.61                66
 01/13/2021   01:53:19   ( -69.27, -28.80) 01/13/2021   01:54:13  ( -69.29, -28.83)    2.95                54
 01/13/2021   02:44:03   (  69.16, 138.66) 01/13/2021   02:43:40  (  69.18, 138.66)    2.38                23
 01/13/2021   03:34:30   ( -68.36, -52.94) 01/13/2021   03:33:21  ( -68.41, -54.67)   70.89                69
 01/15/2021   18:09:40   ( -69.32,  87.05) 01/15/2021   18:10:39  ( -69.34,  87.11)    3.11                59
 01/15/2021   19:00:23   (  69.16,-105.41) 01/15/2021   19:00:07  (  69.17,-105.47)    2.54                16
 01/15/2021   19:50:55   ( -68.58,  62.70) 01/15/2021   19:49:45  ( -68.62,  61.47)   50.11                70