Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 1 2.  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)
 01/02/2021   07:57:32   (  70.30,  58.63) 01/02/2021   07:58:37  (  70.19,  61.26)   99.22                65
 01/02/2021   08:47:55   ( -69.24,-132.47) 01/02/2021   08:48:22  ( -69.25,-132.40)    2.99                27
 01/02/2021   09:38:38   (  69.08,  35.07) 01/02/2021   09:37:50  (  69.09,  35.04)    2.27                48
 01/05/2021   01:04:16   ( -69.23, -16.54) 01/05/2021   01:04:51  ( -69.21, -16.58)    3.04                35
 01/05/2021   01:55:00   (  69.12, 150.93) 01/05/2021   01:54:18  (  69.10, 150.93)    2.03                42
 01/07/2021   17:20:37   ( -69.28,  99.32) 01/07/2021   17:21:17  ( -69.27,  99.38)    2.42                40
 01/07/2021   18:11:20   (  69.12, -93.14) 01/07/2021   18:10:45  (  69.11, -93.19)    2.21                35
 01/10/2021   09:36:58   ( -69.27,-144.74) 01/10/2021   09:37:45  ( -69.27,-144.74)    0.24                47
 01/10/2021   10:27:42   (  69.16,  22.72) 01/10/2021   10:27:12  (  69.16,  22.76)    1.52                30
 01/10/2021   11:18:05   ( -68.10,-168.53) 01/10/2021   11:16:58  ( -68.17,-170.84)   95.58                67
 01/13/2021   01:53:19   ( -69.27, -28.81) 01/13/2021   01:54:13  ( -69.27, -28.86)    2.09                54
 01/13/2021   02:44:03   (  69.16, 138.66) 01/13/2021   02:43:40  (  69.15, 138.63)    1.11                23
 01/13/2021   03:34:31   ( -68.36, -52.95) 01/13/2021   03:33:22  ( -68.39, -54.69)   71.67                69
 01/15/2021   18:09:41   ( -69.32,  87.05) 01/15/2021   18:10:40  ( -69.31,  87.08)    1.27                59
 01/15/2021   19:00:25   (  69.21,-105.49) 01/15/2021   19:00:07  (  69.20,-105.43)    2.62                18
 01/15/2021   19:50:56   ( -68.57,  62.70) 01/15/2021   19:49:46  ( -68.60,  61.44)   51.23                70