Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 7 28.  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)
 07/30/2021   11:06:08   ( -70.72,-167.85) 07/30/2021   11:07:16  ( -70.65,-166.03)   67.47                68
 07/30/2021   11:56:39   (  69.98,   0.64) 07/30/2021   11:56:53  (  70.00,   0.67)    2.31                14
 07/30/2021   12:47:21   ( -69.89, 168.10) 07/30/2021   12:46:23  ( -69.88, 168.14)    1.85                58
 08/02/2021   03:22:32   ( -71.01, -52.39) 08/02/2021   03:23:38  ( -70.90, -49.77)   95.94                66
 08/02/2021   04:12:58   (  70.01, 116.53) 08/02/2021   04:13:19  (  70.03, 116.60)    3.28                21
 08/02/2021   05:03:40   ( -69.91, -76.00) 08/02/2021   05:02:49  ( -69.92, -75.93)    2.87                51
 08/04/2021   20:29:16   (  69.99,-127.49) 08/04/2021   20:29:46  (  70.00,-127.56)    3.27                30
 08/04/2021   21:19:58   ( -69.89,  39.98) 08/04/2021   21:19:16  ( -69.90,  39.92)    2.36                42
 08/07/2021   12:45:35   (  70.02, -11.60) 08/07/2021   12:46:12  (  70.03, -11.65)    2.22                37
 08/07/2021   13:36:17   ( -69.92, 155.88) 08/07/2021   13:35:42  ( -69.92, 155.83)    1.69                35
 08/10/2021   05:01:53   (  70.06, 104.30) 08/10/2021   05:02:37  (  70.04, 104.25)    2.43                44
 08/10/2021   05:52:35   ( -69.95, -88.23) 08/10/2021   05:52:07  ( -69.94, -88.26)    2.17                28