Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 4 2.  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)
 04/03/2021   11:45:13   ( -70.30,-177.79) 04/03/2021   11:46:21  ( -70.17,-175.99)   69.37                68
 04/03/2021   12:35:43   (  69.50,  -9.27) 04/03/2021   12:35:58  (  69.52,  -9.25)    2.58                15
 04/03/2021   13:26:25   ( -69.41, 158.19) 04/03/2021   13:25:28  ( -69.41, 158.24)    2.02                57
 04/06/2021   04:01:38   ( -70.56, -62.28) 04/06/2021   04:02:44  ( -70.44, -59.73)   95.70                66
 04/06/2021   04:52:03   (  69.50, 106.66) 04/06/2021   04:52:26  (  69.51, 106.61)    2.08                23
 04/06/2021   05:42:45   ( -69.41, -85.88) 04/06/2021   05:41:56  ( -69.40, -85.90)    1.32                49
 04/08/2021   21:08:23   (  69.56,-137.48) 04/08/2021   21:08:52  (  69.55,-137.46)    1.63                29
 04/08/2021   21:59:04   ( -69.41,  30.05) 04/08/2021   21:58:22  ( -69.44,  30.03)    3.34                42
 04/11/2021   13:24:43   (  69.56, -21.56) 04/11/2021   13:25:19  (  69.58, -21.53)    2.32                36
 04/11/2021   14:15:25   ( -69.47, 145.90) 04/11/2021   14:14:49  ( -69.48, 145.96)    2.53                36
 04/14/2021   05:41:03   (  69.57,  94.37) 04/14/2021   05:41:47  (  69.56,  94.31)    2.56                44
 04/14/2021   06:31:45   ( -69.47, -98.17) 04/14/2021   06:31:17  ( -69.46, -98.19)    1.95                28