Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 1 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)
 01/13/2021   01:53:19   ( -69.31, -28.87) 01/13/2021   01:54:12  ( -69.32, -28.81)    2.51                53
 01/13/2021   02:44:02   (  69.14, 138.68) 01/13/2021   02:43:40  (  69.16, 138.63)    2.74                22
 01/13/2021   03:34:30   ( -68.36, -52.93) 01/13/2021   03:33:21  ( -68.43, -54.64)   70.51                69
 01/15/2021   18:09:40   ( -69.32,  87.05) 01/15/2021   18:10:40  ( -69.31,  87.07)    1.04                60
 01/15/2021   19:00:24   (  69.20,-105.47) 01/15/2021   19:00:07  (  69.20,-105.43)    1.72                17
 01/15/2021   19:50:56   ( -68.63,  62.64) 01/15/2021   19:49:45  ( -68.65,  61.50)   45.90                71
 01/18/2021   10:26:01   ( -69.33,-157.03) 01/18/2021   10:27:08  ( -69.30,-157.06)    2.80                67
 01/18/2021   11:16:45   (  69.21,  10.45) 01/18/2021   11:16:35  (  69.19,  10.44)    1.83                10
 01/18/2021   12:07:21   ( -68.85, 178.27) 01/18/2021   12:06:08  ( -68.92, 177.72)   23.28                73
 01/21/2021   02:42:22   ( -69.39, -41.19) 01/21/2021   02:43:34  ( -69.35, -41.13)    5.33                72
 01/21/2021   03:33:05   (  69.22, 126.36) 01/21/2021   03:33:01  (  69.23, 126.37)    1.39                 4
 01/21/2021   04:23:45   ( -69.07, -66.11) 01/21/2021   04:22:32  ( -69.07, -66.20)    3.72                73
 01/23/2021   18:58:47   ( -69.61,  74.41) 01/23/2021   18:59:59  ( -69.49,  74.95)   24.58                72
 01/23/2021   19:49:26   (  69.23,-117.73) 01/23/2021   19:49:29  (  69.21,-117.78)    3.11                 3
 01/23/2021   20:40:07   ( -69.13,  49.73) 01/23/2021   20:38:59  ( -69.11,  49.72)    2.81                68