Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 4 8.  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)
 04/08/2021   21:08:23   (  69.53,-137.45) 04/08/2021   21:08:53  (  69.53,-137.49)    1.63                30
 04/08/2021   21:59:05   ( -69.44,  30.00) 04/08/2021   21:58:22  ( -69.47,  30.07)    3.57                43
 04/11/2021   13:24:43   (  69.54, -21.53) 04/11/2021   13:25:20  (  69.56, -21.57)    2.11                37
 04/11/2021   14:15:25   ( -69.46, 145.92) 04/11/2021   14:14:50  ( -69.45, 145.92)    1.04                35
 04/14/2021   05:41:03   (  69.61,  94.31) 04/14/2021   05:41:46  (  69.58,  94.35)    3.27                43
 04/14/2021   06:31:44   ( -69.47, -98.16) 04/14/2021   06:31:16  ( -69.48, -98.17)    0.82                28
 04/16/2021   21:57:23   (  69.63,-149.78) 04/16/2021   21:58:13  (  69.61,-149.75)    2.60                50
 04/16/2021   22:48:04   ( -69.48,  17.75) 04/16/2021   22:47:43  ( -69.50,  17.74)    1.78                21
 04/16/2021   23:38:31   (  68.51,-173.59) 04/16/2021   23:37:24  (  68.61,-175.75)   88.74                67
 04/19/2021   14:13:43   (  69.65, -33.87) 04/19/2021   14:14:40  (  69.62, -33.85)    2.65                57
 04/19/2021   15:04:24   ( -69.50, 133.66) 04/19/2021   15:04:10  ( -69.52, 133.65)    1.87                14
 04/19/2021   15:54:56   (  68.80, -58.04) 04/19/2021   15:53:47  (  68.85, -59.58)   62.26                69