Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 2 18.  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)
 02/19/2021   14:32:54   (  69.42, -38.70) 02/19/2021   14:33:54  (  69.44, -38.68)    2.47                60
 02/19/2021   15:23:35   ( -69.31, 128.78) 02/19/2021   15:23:24  ( -69.33, 128.80)    2.19                11
 02/19/2021   16:14:10   (  68.72, -63.10) 02/19/2021   16:12:59  (  68.77, -64.26)   46.96                71
 02/22/2021   06:49:14   (  69.44,  77.20) 02/22/2021   06:50:20  (  69.42,  77.18)    2.62                66
 02/22/2021   07:39:55   ( -69.33,-115.32) 02/22/2021   07:39:50  ( -69.31,-115.33)    1.88                 5
 02/22/2021   08:30:33   (  68.91,  52.57) 02/22/2021   08:29:21  (  68.98,  51.88)   28.80                72
 02/24/2021   23:05:35   (  69.47,-166.91) 02/24/2021   23:06:46  (  69.45,-166.90)    1.78                71
 02/24/2021   23:56:16   ( -69.34,   0.58) 02/24/2021   23:56:16  ( -69.35,   0.60)    0.48                 0
 02/25/2021   00:46:57   (  69.09, 168.25) 02/25/2021   00:45:45  (  69.12, 167.95)   12.32                72
 02/27/2021   15:21:59   (  69.65, -51.25) 02/27/2021   15:23:10  (  69.59, -50.83)   17.70                71
 02/27/2021   16:12:37   ( -69.36, 116.49) 02/27/2021   16:12:42  ( -69.38, 116.52)    2.02                 5
 02/27/2021   17:03:20   (  69.23, -76.01) 02/27/2021   17:02:10  (  69.20, -76.06)    3.40                70
 03/02/2021   07:38:23   (  69.84,  64.41) 03/02/2021   07:39:34  (  69.73,  65.24)   34.34                71
 03/02/2021   08:28:58   ( -69.38,-127.61) 03/02/2021   08:29:08  ( -69.40,-127.56)    3.12                10
 03/02/2021   09:19:41   (  69.25,  39.89) 03/02/2021   09:18:36  (  69.23,  39.85)    3.07                65