Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 1 26.  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)
 01/26/2021   11:15:12   ( -69.83,-169.98) 01/26/2021   11:16:22  ( -69.73,-168.85)   44.60                70
 01/26/2021   12:05:47   (  69.22,  -1.79) 01/26/2021   12:05:56  (  69.24,  -1.86)    3.41                 9
 01/26/2021   12:56:28   ( -69.14, 165.65) 01/26/2021   12:55:26  ( -69.13, 165.62)    1.57                62
 01/29/2021   03:31:37   ( -70.05, -54.39) 01/29/2021   03:32:46  ( -69.92, -52.71)   65.45                69
 01/29/2021   04:22:09   (  69.29, 114.04) 01/29/2021   04:22:23  (  69.27, 114.05)    3.00                14
 01/29/2021   05:12:48   ( -69.15, -78.44) 01/29/2021   05:11:52  ( -69.16, -78.46)    1.01                56
 01/31/2021   19:48:01   ( -70.27,  61.20) 01/31/2021   19:49:08  ( -70.16,  63.51)   88.07                67
 01/31/2021   20:38:29   (  69.31,-130.06) 01/31/2021   20:38:49  (  69.28,-130.05)    3.03                20
 01/31/2021   21:29:09   ( -69.16,  37.47) 01/31/2021   21:28:19  ( -69.18,  37.45)    1.58                50
 02/03/2021   12:54:49   (  69.28, -14.08) 02/03/2021   12:55:16  (  69.29, -14.15)    3.43                27
 02/03/2021   13:45:30   ( -69.18, 153.38) 02/03/2021   13:44:46  ( -69.19, 153.35)    1.69                44
 02/06/2021   05:11:11   (  69.35, 101.74) 02/06/2021   05:11:42  (  69.36, 101.81)    2.83                31
 02/06/2021   06:01:51   ( -69.20, -90.72) 02/06/2021   06:01:13  ( -69.20, -90.76)    1.66                38
 02/08/2021   21:27:31   (  69.38,-142.36) 02/08/2021   21:28:08  (  69.36,-142.30)    3.28                37
 02/08/2021   22:18:11   ( -69.22,  25.18) 02/08/2021   22:17:39  ( -69.20,  25.13)    2.72                32