Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 10 5.  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)
 10/05/2021   12:25:41   (  70.35,  -6.67) 10/05/2021   12:26:32  (  70.34,  -6.60)    2.60                51
 10/05/2021   13:16:21   ( -70.21, 160.88) 10/05/2021   13:16:02  ( -70.23, 160.86)    1.63                19
 10/05/2021   14:06:50   (  69.30, -30.45) 10/05/2021   14:05:43  (  69.35, -32.70)   88.42                67
 10/08/2021   04:41:57   (  70.33, 109.32) 10/08/2021   04:42:57  (  70.33, 109.25)    2.73                60
 10/08/2021   05:32:38   ( -70.24, -83.21) 10/08/2021   05:32:26  ( -70.27, -83.20)    3.42                12
 10/08/2021   06:23:12   (  69.59,  85.08) 10/08/2021   06:22:03  (  69.61,  83.53)   60.02                69
 10/10/2021   20:58:15   (  70.36,-134.77) 10/10/2021   20:59:22  (  70.36,-134.83)    1.93                67
 10/10/2021   21:48:56   ( -70.26,  32.70) 10/10/2021   21:48:52  ( -70.25,  32.65)    2.71                 4
 10/10/2021   22:39:34   (  69.84,-159.34) 10/10/2021   22:38:23  (  69.91,-160.17)   33.15                71
 10/13/2021   13:14:35   (  70.50, -19.05) 10/13/2021   13:15:46  (  70.43, -18.83)   10.96                71
 10/13/2021   14:05:14   ( -70.29, 148.60) 10/13/2021   14:05:17  ( -70.27, 148.57)    2.86                 3
 10/13/2021   14:55:57   (  70.14, -43.84) 10/13/2021   14:54:44  (  70.16, -43.95)    4.67                73
 10/16/2021   05:30:57   (  70.75,  96.50) 10/16/2021   05:32:08  (  70.61,  97.31)   33.63                71
 10/16/2021   06:21:32   ( -70.33, -95.50) 10/16/2021   06:21:41  ( -70.34, -95.45)    2.70                 9
 10/16/2021   07:12:16   (  70.23,  71.97) 10/16/2021   07:11:08  (  70.23,  72.03)    2.45                68
 10/18/2021   21:47:18   (  71.00,-147.97) 10/18/2021   21:48:27  (  70.89,-146.38)   59.06                69
 10/18/2021   22:37:49   ( -70.36,  20.39) 10/18/2021   22:38:05  ( -70.35,  20.45)    2.49                16
 10/18/2021   23:28:32   (  70.21,-172.07) 10/18/2021   23:27:32  (  70.23,-172.08)    2.01                60