Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 2 24.  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)
 02/24/2021   23:56:16   ( -69.34,   0.59) 02/24/2021   23:56:19  ( -69.36,   0.60)    2.62                 3
 02/25/2021   00:46:59   (  69.19, 168.12) 02/25/2021   00:45:47  (  69.20, 168.04)    3.53                72
 02/27/2021   15:22:01   (  69.81, -51.48) 02/27/2021   15:23:12  (  69.68, -50.73)   32.08                71
 02/27/2021   16:12:36   ( -69.37, 116.49) 02/27/2021   16:12:46  ( -69.35, 116.46)    2.06                10
 02/27/2021   17:03:19   (  69.22, -76.00) 02/27/2021   17:02:13  (  69.24, -76.03)    2.47                66
 03/02/2021   07:38:26   (  70.05,  64.08) 03/02/2021   07:39:35  (  69.93,  65.50)   55.69                69
 03/02/2021   08:28:57   ( -69.39,-127.62) 03/02/2021   08:29:13  ( -69.39,-127.61)    1.12                16
 03/02/2021   09:19:40   (  69.26,  39.88) 03/02/2021   09:18:40  (  69.27,  39.89)    1.65                60
 03/04/2021   23:54:51   (  70.30, 179.63) 03/04/2021   23:55:58  (  70.18,-178.27)   80.26                67
 03/05/2021   00:45:18   ( -69.42, -11.74) 03/05/2021   00:45:40  ( -69.42, -11.69)    2.03                22
 03/05/2021   01:36:01   (  69.30, 155.76) 03/05/2021   01:35:07  (  69.30, 155.80)    1.65                54
 03/07/2021   17:01:39   ( -69.46, 104.15) 03/07/2021   17:02:07  ( -69.44, 104.22)    3.45                28
 03/07/2021   17:52:22   (  69.34, -88.36) 03/07/2021   17:51:34  (  69.32, -88.29)    3.27                48
 03/10/2021   09:17:58   ( -69.44,-139.89) 03/10/2021   09:18:33  ( -69.46,-139.88)    2.09                35
 03/10/2021   10:08:41   (  69.32,  27.58) 03/10/2021   10:08:00  (  69.34,  27.61)    1.77                41