Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 8 2.  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)
 08/02/2021   04:12:58   (  69.99, 116.56) 08/02/2021   04:13:20  (  70.00, 116.55)    0.97                22
 08/02/2021   05:03:40   ( -69.90, -75.98) 08/02/2021   05:02:50  ( -69.88, -75.98)    2.18                50
 08/04/2021   20:29:17   (  70.03,-127.54) 08/04/2021   20:29:46  (  70.03,-127.53)    0.87                29
 08/04/2021   21:19:59   ( -69.93,  39.92) 08/04/2021   21:19:16  ( -69.92,  39.95)    1.98                43
 08/07/2021   12:45:35   (  70.06, -11.65) 08/07/2021   12:46:11  (  70.06, -11.61)    1.68                36
 08/07/2021   13:36:17   ( -69.96, 155.81) 08/07/2021   13:35:41  ( -69.95, 155.87)    2.83                36
 08/10/2021   05:01:54   (  70.10, 104.23) 08/10/2021   05:02:37  (  70.08, 104.30)    3.17                43
 08/10/2021   05:52:35   ( -69.95, -88.22) 08/10/2021   05:52:07  ( -69.97, -88.22)    2.91                28
 08/12/2021   21:18:12   (  70.08,-139.80) 08/12/2021   21:19:03  (  70.10,-139.79)    1.85                51
 08/12/2021   22:08:54   ( -69.98,  27.67) 08/12/2021   22:08:33  ( -69.99,  27.69)    1.43                21
 08/12/2021   22:59:21   (  69.03,-163.62) 08/12/2021   22:58:14  (  69.10,-165.86)   89.22                67
 08/15/2021   13:34:31   (  70.12, -23.92) 08/15/2021   13:35:29  (  70.11, -23.89)    1.45                58
 08/15/2021   14:25:12   ( -70.02, 143.55) 08/15/2021   14:24:58  ( -70.01, 143.60)    2.08                14
 08/15/2021   15:15:44   (  69.33, -48.11) 08/15/2021   15:14:34  (  69.40, -49.60)   58.61                70