Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 2 11.  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)
 02/11/2021   13:43:52   (  69.35, -26.39) 02/11/2021   13:44:36  (  69.35, -26.44)    1.88                44
 02/11/2021   14:34:33   ( -69.25, 141.06) 02/11/2021   14:34:06  ( -69.24, 141.05)    1.80                27
 02/14/2021   06:00:12   (  69.37,  89.50) 02/14/2021   06:01:01  (  69.40,  89.51)    3.05                49
 02/14/2021   06:50:53   ( -69.27,-103.03) 02/14/2021   06:50:31  ( -69.29,-103.00)    2.42                22
 02/14/2021   07:41:20   (  68.25,  65.66) 02/14/2021   07:40:14  (  68.29,  63.39)   93.52                66
 02/16/2021   22:16:33   (  69.40,-154.61) 02/16/2021   22:17:28  (  69.39,-154.62)    1.36                55
 02/16/2021   23:07:14   ( -69.30,  12.86) 02/16/2021   23:06:58  ( -69.29,  12.87)    1.18                16
 02/16/2021   23:57:45   (  68.50,-178.73) 02/16/2021   23:56:36  (  68.56, 179.60)   68.47                69
 02/19/2021   14:32:54   (  69.43, -38.72) 02/19/2021   14:33:54  (  69.43, -38.68)    1.60                60
 02/19/2021   15:23:35   ( -69.32, 128.76) 02/19/2021   15:23:24  ( -69.33, 128.81)    2.35                11
 02/19/2021   16:14:09   (  68.69, -63.05) 02/19/2021   16:12:59  (  68.77, -64.26)   49.49                70
 02/22/2021   06:49:14   (  69.41,  77.24) 02/22/2021   06:50:21  (  69.41,  77.18)    2.35                67
 02/22/2021   07:39:54   ( -69.29,-115.27) 02/22/2021   07:39:50  ( -69.31,-115.32)    3.05                 4
 02/22/2021   08:30:33   (  68.94,  52.54) 02/22/2021   08:29:21  (  68.97,  51.88)   26.68                72
 02/24/2021   23:05:34   (  69.45,-166.88) 02/24/2021   23:06:46  (  69.45,-166.90)    0.64                72
 02/24/2021   23:56:15   ( -69.32,   0.62) 02/24/2021   23:56:16  ( -69.35,   0.61)    2.95                 1
 02/25/2021   00:46:57   (  69.13, 168.20) 02/25/2021   00:45:44  (  69.17, 168.02)    8.32                73