Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 7 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)
 07/06/2021   08:39:07   ( -69.88,-130.01) 07/06/2021   08:39:36  ( -69.90,-130.03)    2.82                29
 07/06/2021   09:29:51   (  69.79,  37.43) 07/06/2021   09:29:03  (  69.80,  37.47)    1.44                48
 07/09/2021   00:55:26   ( -69.89, -14.09) 07/09/2021   00:56:02  ( -69.91, -14.15)    2.82                36
 07/09/2021   01:46:10   (  69.81, 153.34) 07/09/2021   01:45:29  (  69.80, 153.35)    1.69                41
 07/11/2021   17:11:46   ( -69.96, 101.75) 07/11/2021   17:12:27  ( -69.96, 101.81)    2.32                41
 07/11/2021   18:02:29   (  69.84, -90.75) 07/11/2021   18:01:54  (  69.85, -90.70)    2.54                35
 07/14/2021   09:28:05   ( -69.98,-142.33) 07/14/2021   09:28:53  ( -69.96,-142.31)    2.47                48
 07/14/2021   10:18:48   (  69.86,  25.16) 07/14/2021   10:18:20  (  69.84,  25.17)    2.16                28
 07/14/2021   11:09:12   ( -68.82,-166.03) 07/14/2021   11:08:06  ( -68.85,-168.50)   99.15                66
 07/17/2021   01:44:23   ( -70.00, -26.42) 07/17/2021   01:45:17  ( -70.00, -26.37)    2.02                54
 07/17/2021   02:35:06   (  69.89, 141.06) 07/17/2021   02:34:44  (  69.88, 141.11)    2.05                22
 07/17/2021   03:25:34   ( -69.05, -50.41) 07/17/2021   03:24:26  ( -69.12, -52.28)   74.58                68
 07/19/2021   18:00:41   ( -69.97,  89.57) 07/19/2021   18:01:43  ( -69.98,  89.49)    3.53                62
 07/19/2021   18:51:24   (  69.86,-102.96) 07/19/2021   18:51:10  (  69.86,-103.03)    2.75                14
 07/19/2021   19:41:58   ( -69.34,  65.13) 07/19/2021   19:40:47  ( -69.38,  63.95)   46.61                71