Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 10 1.  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)
 10/02/2021   20:09:22   (  70.28,-122.50) 10/02/2021   20:10:07  (  70.29,-122.56)    2.35                45
 10/02/2021   21:00:03   ( -70.19,  44.96) 10/02/2021   20:59:37  ( -70.18,  44.91)    2.48                26
 10/05/2021   12:25:41   (  70.36,  -6.67) 10/05/2021   12:26:32  (  70.34,  -6.61)    3.10                51
 10/05/2021   13:16:21   ( -70.21, 160.88) 10/05/2021   13:16:02  ( -70.23, 160.86)    1.75                19
 10/05/2021   14:06:50   (  69.30, -30.45) 10/05/2021   14:05:43  (  69.34, -32.71)   88.60                67
 10/08/2021   04:41:58   (  70.38, 109.24) 10/08/2021   04:42:56  (  70.37, 109.32)    3.10                58
 10/08/2021   05:32:39   ( -70.28, -83.28) 10/08/2021   05:32:26  ( -70.26, -83.20)    3.72                13
 10/08/2021   06:23:12   (  69.59,  85.08) 10/08/2021   06:22:02  (  69.66,  83.59)   57.85                70
 10/10/2021   20:58:15   (  70.35,-134.77) 10/10/2021   20:59:22  (  70.35,-134.83)    2.56                67
 10/10/2021   21:48:56   ( -70.25,  32.71) 10/10/2021   21:48:52  ( -70.24,  32.65)    2.69                 4
 10/10/2021   22:39:34   (  69.83,-159.33) 10/10/2021   22:38:23  (  69.91,-160.18)   33.64                71
 10/13/2021   13:14:35   (  70.49, -19.03) 10/13/2021   13:15:46  (  70.43, -18.84)   10.08                71
 10/13/2021   14:05:14   ( -70.28, 148.62) 10/13/2021   14:05:17  ( -70.27, 148.57)    2.38                 3
 10/13/2021   14:55:57   (  70.13, -43.83) 10/13/2021   14:54:44  (  70.15, -43.96)    5.58                73