Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 2 20.  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)
 02/22/2021   06:49:14   (  69.43,  77.21) 02/22/2021   06:50:22  (  69.42,  77.18)    1.61                68
 02/22/2021   07:39:55   ( -69.32,-115.31) 02/22/2021   07:39:52  ( -69.31,-115.34)    1.20                 3
 02/22/2021   08:30:34   (  68.95,  52.52) 02/22/2021   08:29:22  (  69.04,  51.95)   24.70                72
 02/24/2021   23:05:37   (  69.57,-167.06) 02/24/2021   23:06:48  (  69.52,-166.81)   10.56                71
 02/24/2021   23:56:16   ( -69.34,   0.59) 02/24/2021   23:56:19  ( -69.36,   0.61)    2.35                 3
 02/25/2021   00:46:59   (  69.19, 168.11) 02/25/2021   00:45:47  (  69.19, 168.03)    3.00                72
 02/27/2021   15:22:02   (  69.81, -51.49) 02/27/2021   15:23:13  (  69.68, -50.73)   32.97                71
 02/27/2021   16:12:37   ( -69.37, 116.48) 02/27/2021   16:12:47  ( -69.35, 116.47)    1.90                10
 02/27/2021   17:03:20   (  69.23, -76.01) 02/27/2021   17:02:14  (  69.24, -76.03)    1.34                66
 03/02/2021   07:38:26   (  70.06,  64.07) 03/02/2021   07:39:35  (  69.94,  65.51)   56.58                69
 03/02/2021   08:28:57   ( -69.40,-127.63) 03/02/2021   08:29:13  ( -69.40,-127.60)    1.55                16
 03/02/2021   09:19:40   (  69.27,  39.87) 03/02/2021   09:18:40  (  69.28,  39.89)    1.51                60
 03/04/2021   23:54:51   (  70.31, 179.61) 03/04/2021   23:55:58  (  70.19,-178.25)   81.43                67
 03/05/2021   00:45:17   ( -69.38, -11.67) 03/05/2021   00:45:41  ( -69.38, -11.74)    2.73                24
 03/05/2021   01:36:01   (  69.30, 155.75) 03/05/2021   01:35:07  (  69.31, 155.82)    2.95                54