Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 10 6.  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)
 10/08/2021   04:41:58   (  70.37, 109.27) 10/08/2021   04:42:57  (  70.34, 109.27)    2.74                59
 10/08/2021   05:32:38   ( -70.22, -83.19) 10/08/2021   05:32:27  ( -70.23, -83.26)    2.63                11
 10/08/2021   06:23:12   (  69.58,  85.10) 10/08/2021   06:22:03  (  69.62,  83.55)   60.31                69
 10/10/2021   20:58:16   (  70.39,-134.83) 10/10/2021   20:59:22  (  70.37,-134.80)    2.80                66
 10/10/2021   21:48:56   ( -70.25,  32.72) 10/10/2021   21:48:52  ( -70.26,  32.67)    2.36                 4
 10/10/2021   22:39:35   (  69.87,-159.39) 10/10/2021   22:38:23  (  69.93,-160.15)   29.76                72
 10/13/2021   13:14:35   (  70.48, -19.02) 10/13/2021   13:15:46  (  70.45, -18.81)    8.54                71
 10/13/2021   14:05:14   ( -70.28, 148.63) 10/13/2021   14:05:17  ( -70.29, 148.59)    1.90                 3
 10/13/2021   14:55:57   (  70.12, -43.81) 10/13/2021   14:54:45  (  70.12, -44.00)    7.20                72
 10/16/2021   05:30:56   (  70.72,  96.53) 10/16/2021   05:32:07  (  70.63,  97.34)   31.62                71
 10/16/2021   06:21:31   ( -70.31, -95.47) 10/16/2021   06:21:41  ( -70.31, -95.50)    1.09                10
 10/16/2021   07:12:15   (  70.20,  72.00) 10/16/2021   07:11:08  (  70.19,  71.98)    1.64                67
 10/18/2021   21:47:19   (  71.02,-148.02) 10/18/2021   21:48:27  (  70.91,-146.34)   62.00                68
 10/18/2021   22:37:49   ( -70.34,  20.43) 10/18/2021   22:38:06  ( -70.32,  20.40)    2.43                17
 10/18/2021   23:28:33   (  70.24,-172.11) 10/18/2021   23:27:32  (  70.26,-172.05)    2.87                61