Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 1 21.  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)
 01/23/2021   18:58:47   ( -69.61,  74.42) 01/23/2021   18:59:58  ( -69.54,  75.00)   23.81                71
 01/23/2021   19:49:27   (  69.27,-117.79) 01/23/2021   19:49:28  (  69.26,-117.71)    2.93                 1
 01/23/2021   20:40:07   ( -69.13,  49.73) 01/23/2021   20:38:58  ( -69.15,  49.78)    3.11                69
 01/26/2021   11:15:12   ( -69.82,-169.98) 01/26/2021   11:16:22  ( -69.73,-168.85)   44.49                70
 01/26/2021   12:05:47   (  69.23,  -1.80) 01/26/2021   12:05:56  (  69.24,  -1.87)    2.94                 9
 01/26/2021   12:56:28   ( -69.14, 165.65) 01/26/2021   12:55:26  ( -69.13, 165.63)    1.24                62
 01/29/2021   03:31:37   ( -70.05, -54.38) 01/29/2021   03:32:46  ( -69.93, -52.70)   65.35                69
 01/29/2021   04:22:09   (  69.29, 114.04) 01/29/2021   04:22:23  (  69.26, 114.05)    3.47                14
 01/29/2021   05:12:49   ( -69.15, -78.43) 01/29/2021   05:11:53  ( -69.16, -78.46)    1.55                56
 01/31/2021   19:48:01   ( -70.27,  61.20) 01/31/2021   19:49:08  ( -70.17,  63.53)   88.10                67
 01/31/2021   20:38:29   (  69.31,-130.06) 01/31/2021   20:38:49  (  69.29,-130.04)    2.86                20
 01/31/2021   21:29:09   ( -69.16,  37.48) 01/31/2021   21:28:19  ( -69.18,  37.46)    2.82                50
 02/03/2021   12:54:50   (  69.33, -14.15) 02/03/2021   12:55:16  (  69.30, -14.14)    2.90                26
 02/03/2021   13:45:31   ( -69.23, 153.31) 02/03/2021   13:44:46  ( -69.20, 153.37)    3.26                45