Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 7 9.  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)
 07/11/2021   17:11:45   ( -69.92, 101.81) 07/11/2021   17:12:27  ( -69.95, 101.79)    3.19                42
 07/11/2021   18:02:29   (  69.85, -90.76) 07/11/2021   18:01:54  (  69.84, -90.71)    2.13                35
 07/14/2021   09:28:04   ( -69.94,-142.27) 07/14/2021   09:28:53  ( -69.94,-142.33)    2.45                49
 07/14/2021   10:18:47   (  69.82,  25.22) 07/14/2021   10:18:20  (  69.83,  25.16)    2.97                27
 07/14/2021   11:09:12   ( -68.83,-166.05) 07/14/2021   11:08:06  ( -68.84,-168.51)   99.13                66
 07/17/2021   01:44:24   ( -70.01, -26.44) 07/17/2021   01:45:18  ( -69.99, -26.39)    2.91                54
 07/17/2021   02:35:07   (  69.89, 141.05) 07/17/2021   02:34:45  (  69.87, 141.10)    3.00                22
 07/17/2021   03:25:34   ( -69.06, -50.42) 07/17/2021   03:24:26  ( -69.11, -52.29)   74.43                68
 07/19/2021   18:00:42   ( -70.03,  89.47) 07/19/2021   18:01:42  ( -70.03,  89.55)    2.98                60
 07/19/2021   18:51:24   (  69.87,-102.97) 07/19/2021   18:51:10  (  69.86,-103.04)    3.05                14
 07/19/2021   19:41:57   ( -69.29,  65.19) 07/19/2021   19:40:47  ( -69.37,  63.93)   50.19                70
 07/22/2021   10:17:00   ( -70.00,-154.54) 07/22/2021   10:18:08  ( -70.01,-154.59)    2.37                68
 07/22/2021   11:07:43   (  69.89,  12.93) 07/22/2021   11:07:35  (  69.89,  12.89)    1.86                 8
 07/22/2021   11:58:20   ( -69.53,-179.20) 07/22/2021   11:57:08  ( -69.62,-179.84)   27.07                72